APA (7th ed.) Citation

Sibley, D. (2009). The Sibley guide to trees (First edition.). Alfred A. Knopf.

Chicago Style (17th ed.) Citation

Sibley, David. The Sibley Guide to Trees. First edition. New York: Alfred A. Knopf, 2009.

MLA (9th ed.) Citation

Sibley, David. The Sibley Guide to Trees. First edition. Alfred A. Knopf, 2009.