APA (7th ed.) Citation

Callenbach, E. (2008). Ecology: A pocket guide (Rev. and expanded.). University of California Press.

Chicago Style (17th ed.) Citation

Callenbach, Ernest. Ecology: A Pocket Guide. Rev. and expanded. Berkeley ; London: University of California Press, 2008.

MLA (9th ed.) Citation

Callenbach, Ernest. Ecology: A Pocket Guide. Rev. and expanded. University of California Press, 2008.