APA (7th ed.) Citation

Sibley, D. A. (2016). Sibley birds east: Field guide to birds of eastern North America (Second [revised]edition.). Alfred A. Knopf.

Chicago Style (17th ed.) Citation

Sibley, David Allen. Sibley Birds East: Field Guide to Birds of Eastern North America. Second [revised]edition. New York: Alfred A. Knopf, 2016.

MLA (9th ed.) Citation

Sibley, David Allen. Sibley Birds East: Field Guide to Birds of Eastern North America. Second [revised]edition. Alfred A. Knopf, 2016.