Bauer, Esther M. "An Impulse to Happiness." The Washington Post 28 Mar. 2000: n.
pag. Science in context. Web. 14 Mar. 2015.
<http://Ic.galegroup.com>.
"Biochemistry of Methamphetamine Dopamin." macalester.edu. U of Michigan Health
System, n.d. Web. 14 Mar. 2015. <http://www.macalester.edu/academics/
psychology/whathap/ubnrp/meth08/biochemistry/dopamine.htm>.
Boeree, George C. "The Emotional Nervous System." webspace.ship.edu. N.p., 2009.
Web. 18 Mar. 2015. <http://www.webspace.ship.edu/cgboer/
limbicsystem.html>.
Carver, Joseph M. "Depression Causes, Symptoms, and Treatments."
drjoecarver.com. N.p., n.d. Web. 13 Mar. 2015.
<http://www.drjoecarver.com/clients/49355/file/DEPRESSION>.
"The Good and Bad Side of Dopamine." news-medical.net. N.p., 9 July 2008. Web.
12 Mar. 2015. <http://www.new-medical.net/news/2008/07/09/
39874.aspx>.
Leuenberger, Andrea. "Endorphins, Exercise, and Addictions: A Review of Exercise
Dependence." impulse.appstate.edu. Lafayette College, 2006. Web. 16 Mar.
2015. <http://impulse.appstate.edu/sites/impulse/files>.
Mandal, Ananya. "What Is Serotonin?" Ed. Sally Robertson. news-medical.net. AZO
network, 13 Feb. 2014. Web. 13 Mar. 2015. <http://www.news-medical.net/
health/what-is-serotonin>.
"Oxytocins and Oxytoxic Hormones." World of Anatomy and Physiology (2007): n.
pag. Gale science in context. Web. 12 Mar. 2015.
<http://ic.galegroup.com/ic/scic/ReferenceDetailsPage/
ReferenceDetailsWindow>.
Paul, Marla. "Study Finds Oxytocin Strenghts Memories of Both Bad and Good
Events." feinber.northwester.edu. feinberg school of medicine, 22 July
2013. Web. 13 Mar. 2015. <http://feinberg.northwestern.edu/news/2013/07/
oxytocin_stress.html>.
Quinn, Elizabeth. "The Runner's High." sportsmedicine.com. N.p., 9 Apr. 2014.
Web. 18 Mar. 2015. <http://www.sportsmedicine.about.com/
od.anatomyandphysiology/ct/Runners-High.htm>.
Sinek, Simon. "Are Human Beings Biologically Designed to Be Good."
glennbeck.com. N.p., 29 July 2014. Web. 16 Mar. 2015.
<http://www.glenback.com/2014/07/29/
are-human-beings-biologically-designed-to-be-good/>.
"Regulation of Emesis." washington.edu. N.p., 2011. Web. 20 Mar. 2015.
<http://www.courses.washington.edu/conj/bess/emesis.html>.
pag. Science in context. Web. 14 Mar. 2015.
<http://Ic.galegroup.com>.
"Biochemistry of Methamphetamine Dopamin." macalester.edu. U of Michigan Health
System, n.d. Web. 14 Mar. 2015. <http://www.macalester.edu/academics/
psychology/whathap/ubnrp/meth08/biochemistry/dopamine.htm>.
Boeree, George C. "The Emotional Nervous System." webspace.ship.edu. N.p., 2009.
Web. 18 Mar. 2015. <http://www.webspace.ship.edu/cgboer/
limbicsystem.html>.
Carver, Joseph M. "Depression Causes, Symptoms, and Treatments."
drjoecarver.com. N.p., n.d. Web. 13 Mar. 2015.
<http://www.drjoecarver.com/clients/49355/file/DEPRESSION>.
"The Good and Bad Side of Dopamine." news-medical.net. N.p., 9 July 2008. Web.
12 Mar. 2015. <http://www.new-medical.net/news/2008/07/09/
39874.aspx>.
Leuenberger, Andrea. "Endorphins, Exercise, and Addictions: A Review of Exercise
Dependence." impulse.appstate.edu. Lafayette College, 2006. Web. 16 Mar.
2015. <http://impulse.appstate.edu/sites/impulse/files>.
Mandal, Ananya. "What Is Serotonin?" Ed. Sally Robertson. news-medical.net. AZO
network, 13 Feb. 2014. Web. 13 Mar. 2015. <http://www.news-medical.net/
health/what-is-serotonin>.
"Oxytocins and Oxytoxic Hormones." World of Anatomy and Physiology (2007): n.
pag. Gale science in context. Web. 12 Mar. 2015.
<http://ic.galegroup.com/ic/scic/ReferenceDetailsPage/
ReferenceDetailsWindow>.
Paul, Marla. "Study Finds Oxytocin Strenghts Memories of Both Bad and Good
Events." feinber.northwester.edu. feinberg school of medicine, 22 July
2013. Web. 13 Mar. 2015. <http://feinberg.northwestern.edu/news/2013/07/
oxytocin_stress.html>.
Quinn, Elizabeth. "The Runner's High." sportsmedicine.com. N.p., 9 Apr. 2014.
Web. 18 Mar. 2015. <http://www.sportsmedicine.about.com/
od.anatomyandphysiology/ct/Runners-High.htm>.
Sinek, Simon. "Are Human Beings Biologically Designed to Be Good."
glennbeck.com. N.p., 29 July 2014. Web. 16 Mar. 2015.
<http://www.glenback.com/2014/07/29/
are-human-beings-biologically-designed-to-be-good/>.
"Regulation of Emesis." washington.edu. N.p., 2011. Web. 20 Mar. 2015.
<http://www.courses.washington.edu/conj/bess/emesis.html>.