APA (7th ed.) Citation

Peterson, R. T., & DiGiorgio, M. (2010). Peterson field guide to birds of Western North America (4th ed.). Houghton Mifflin Harcourt.

Chicago Style (17th ed.) Citation

Peterson, Roger Tory, and Michael DiGiorgio. Peterson Field Guide to Birds of Western North America. 4th ed. Boston [Mass.]: Houghton Mifflin Harcourt, 2010.

MLA (8th ed.) Citation

Peterson, Roger Tory, and Michael DiGiorgio. Peterson Field Guide to Birds of Western North America. 4th ed. Houghton Mifflin Harcourt, 2010.

Warning: These citations may not always be 100% accurate.