Cita APA (7th ed.)

.Townsend, C. R., Begon, M., .Townsend, C. R., & .Harper, J. L. (2008). Essentials of ecology (2rd ed.). Blackwell Pub.

Cita Chicago (17th ed.)

.Townsend, Colin R., Michael Begon, Colin R. .Townsend, i John L. .Harper. Essentials of Ecology. 2rd ed. Malden, MA: Blackwell Pub, 2008.

Cita MLA (9th ed.)

.Townsend, Colin R., et al. Essentials of Ecology. 2rd ed. Blackwell Pub, 2008.