APA (7th ed.) Citation

Peterson, R. T., Mountfort, G., & Hollom, P. A. D. (1993). A field guide to birds of Britain and Europe (5th ed.). Houghton Mifflin.

Chicago Style (17th ed.) Citation

Peterson, Roger Tory, Guy Mountfort, and P. A. D. Hollom. A Field Guide to Birds of Britain and Europe. 5th ed. Boston: Houghton Mifflin, 1993.

MLA (9th ed.) Citation

Peterson, Roger Tory, et al. A Field Guide to Birds of Britain and Europe. 5th ed. Houghton Mifflin, 1993.