Dyfyniad APA

Begon, M., Howarth, R. W., & Townsend, C. R. (2014). Essentials of ecology (Fourth edition.). John Wiley & Sons, Inc.

Dyfyniad Arddull Chicago

Begon, Michael, Robert W. Howarth, and Colin R. Townsend. Essentials of Ecology. Fourth edition. New Jersey: John Wiley & Sons, Inc, 2014.

Dyfyniad MLA

Begon, Michael, et al. Essentials of Ecology. Fourth edition. John Wiley & Sons, Inc, 2014.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.