APA (7th ed.) Citation

Cooley, C. E., & Doubleday, N. (1973). Encyclopedia of world travel (2nd rev. ed.). Doubleday.

Chicago Style (17th ed.) Citation

Cooley, C. Earl, and Nelson Doubleday. Encyclopedia of World Travel. 2nd rev. ed. New York: Doubleday, 1973.

MLA (9th ed.) Citation

Cooley, C. Earl, and Nelson Doubleday. Encyclopedia of World Travel. 2nd rev. ed. Doubleday, 1973.