APA (7th ed.) Citation

Peterson, R. T., DiGiorgio, M., Lehman, P. E., Pyle, P., & Rosche, L. (2020). Peterson field guide to birds of western North America (Fifth edition.). Houghton Mifflin Harcourt.

Chicago Style (17th ed.) Citation

Peterson, Roger Tory, Michael DiGiorgio, Paul E. Lehman, Peter Pyle, and Larry Rosche. Peterson Field Guide to Birds of Western North America. Fifth edition. Boston: Houghton Mifflin Harcourt, 2020.

MLA (8th ed.) Citation

Peterson, Roger Tory, et al. Peterson Field Guide to Birds of Western North America. Fifth edition. Houghton Mifflin Harcourt, 2020.

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