John-Alder, Henry B., and Robert M. Cox. "Development of sexual size dimorphism in lizards: testosterone as a bipotential growth regulator." Sex, Size and Gender Roles: Evolutionary Studies of Sexual Size Dimorphism. : Oxford University Press, 2007-07-05. Oxford Scholarship Online. 2007-09-01. Date Accessed 22 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199208784.001.0001/acprof-9780199208784-chapter-22>.
John-Alder, H., & Cox, R.(2007-07-05). Development of sexual size dimorphism in lizards: testosterone as a bipotential growth regulator. In Sex, Size and Gender Roles: Evolutionary Studies of Sexual Size Dimorphism. : Oxford University Press. Retrieved 22 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199208784.001.0001/acprof-9780199208784-chapter-22.
John-Alder, Henry B., and Robert M. Cox. "Development of sexual size dimorphism in lizards: testosterone as a bipotential growth regulator." In Sex, Size and Gender Roles: Evolutionary Studies of Sexual Size Dimorphism. : Oxford University Press, 2007-07-05. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199208784.001.0001/acprof-9780199208784-chapter-22.
John-Alder HB, Cox RM. Development of sexual size dimorphism in lizards: testosterone as a bipotential growth regulator. In: Fairbairn DJ, Blanckenhorn WU, Székely T. Sex, Size and Gender Roles: Evolutionary Studies of Sexual Size Dimorphism. Oxford University Press; 2007. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199208784.001.0001/acprof-9780199208784-chapter-22. Accessed May 22, 2013.