Cita APA (7th ed.)
Sommer, V., & Vasey, P. L. (2010). Homosexual behaviour in animals: An evolutionary perspective. Cambridge University Press.
Cita Chicago (17th ed.)
Sommer, Volker, i Paul L. Vasey. Homosexual Behaviour in Animals: An Evolutionary Perspective. Cambridge ; New York: Cambridge University Press, 2010.
Cita MLA (9th ed.)
Sommer, Volker, i Paul L. Vasey. Homosexual Behaviour in Animals: An Evolutionary Perspective. Cambridge University Press, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.