"Buck v. Bell." West's Encyclopedia of American Law, edition 2. 2008. The Gale Group 25 May. 2017 http://legal-dictionary.thefreedictionary.com/Buck+v.+Bell
Beaver, Kevin M, James C. Barnes, and Brian B. Boutwell. The Nurture Versus Biosocial Debate in Criminology: On the Origins of Criminal Behavior and Criminality. Thousand Oaks, California: SAGE Publications, Inc., 2015. Print.
Crossman, Ashley. "What is Sociobiology?" ThoughtCo. N.p., 02 Mar. 2017. Web. 25 May 2017.
Eysenck, Hans J, and Gisli H. Gudjonsson. The Causes and Cures of Criminality. Boston, MA: Springer US, 1989. Internet resource.
E-Criminal Psychology. "Criminal Behavior." Criminal Psychology. N.p., n.d. Web. 25 May 2017.
Ford, Robert. "Biological and Psychological Theories of Crime." Nature of Crime. N.p., n.d. Web. 25 May 2017.
Helfgott, Jacqueline B. Criminal Behavior: Theories, Typologies, and Criminal Justice. Los Angeles: SAGE, 2008. Print.
MacLaughlin, Eugene, John Muncie, and Gordon Hughes. Criminological perspectives: essential readings. London: SAGE, 2013. Print.