.Townsend, C. R., Begon, M., .Townsend, C. R., & .Harper, J. L. (2008). Essentials of ecology (2rd ed.). Blackwell Pub.
Style de citation Chicago (17e éd.).Townsend, Colin R., Michael Begon, Colin R. .Townsend, et John L. .Harper. Essentials of Ecology. 2rd ed. Malden, MA: Blackwell Pub, 2008.
Style de citation MLA (9e éd.).Townsend, Colin R., et al. Essentials of Ecology. 2rd ed. Blackwell Pub, 2008.