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 (2., rev. and enl. ed.). Houghton Mifflin.

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. 2., rev. and enl. ed. Boston: Houghton Mifflin, 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. 2., rev. and enl. ed. Houghton Mifflin, 1947.