.Townsend, C. R., Begon, M., .Townsend, C. R., & .Harper, J. L. (2008). Essentials of ecology (2rd ed.). Blackwell Pub.
Chicago-čujuhus (17. p.).Townsend, Colin R., Michael Begon, Colin R. .Townsend, juo John L. .Harper. Essentials of Ecology. 2rd ed. Malden, MA: Blackwell Pub, 2008.
MLA-čujuhus (9. p.).Townsend, Colin R., et al. Essentials of Ecology. 2rd ed. Blackwell Pub, 2008.
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