APA (7th ed.) Citation

Edwards, E. P., & Loftin, H. (1971). Finding birds in Panama (2d ed. Rev. and enl.). [publisher not identified].

Chicago Style (17th ed.) Citation

Edwards, Ernest Preston, and Horace Loftin. Finding Birds in Panama. 2d ed. Rev. and enl. Sweet Briar, Va.: [publisher not identified], 1971.

MLA (9th ed.) Citation

Edwards, Ernest Preston, and Horace Loftin. Finding Birds in Panama. 2d ed. Rev. and enl. [publisher not identified], 1971.