Alcock, John. Animal Behavior: An Evolutionary Approach. 10th ed. Sunderland, Mass: Sinauer Associates, 2013. Print.
Begon, Michael et al. Ecology: From Individuals to Ecosystems. 4th ed. Malden, Mass: Blackwell, 2006. Web. <https://ebookcentral.proquest.com/lib/uea/detail.action?docID=243556>.
Dawkins, Richard. The Selfish Gene. 30th anniversary ed. Oxford: Oxford University Press, 2006. Web. <https://ebookcentral.proquest.com/lib/uea/detail.action?docID=422874>.
Zimmer, Carl. The Tangled Bank: An Introduction to Evolution. Second edition. Greenwood Village, Colorado: Roberts and Company, 2014. Print.
