APA (7th ed.) Citation

Walton, R. K., Lawson, R. W., & Peterson, R. T. (1989). Birding by ear: A guide to bird-song identification: Eastern/Central. Houghton Mifflin Co..

Chicago Style (17th ed.) Citation

Walton, Richard K., Robert W. Lawson, and Roger Tory Peterson. Birding by Ear: A Guide to Bird-song Identification: Eastern/Central. Boston, Mass.: Houghton Mifflin Co., 1989.

MLA (9th ed.) Citation

Walton, Richard K., et al. Birding by Ear: A Guide to Bird-song Identification: Eastern/Central. Houghton Mifflin Co., 1989.