APA (7th ed.) Citation

Peterson, R. T. (1947). A field guide to the birds: Giving field marks of all species found east of the Rockies (Second revised and enlarged edition.). Houghton Mifflin Co..

Chicago Style (17th ed.) Citation

Peterson, Roger Tory. A Field Guide to the Birds: Giving Field Marks of All Species Found East of the Rockies. Second revised and enlarged edition. Boston: Houghton Mifflin Co., 1947.

MLA (9th ed.) Citation

Peterson, Roger Tory. A Field Guide to the Birds: Giving Field Marks of All Species Found East of the Rockies. Second revised and enlarged edition. Houghton Mifflin Co., 1947.