APA (7th ed.) Citation

Colby, C. B. (1956). America's natural wonders: Strange forests, mysterious caverns and amazing formations. Coward-McCann.

Chicago Style (17th ed.) Citation

Colby, C. B. America's Natural Wonders: Strange Forests, Mysterious Caverns and Amazing Formations. New York: Coward-McCann, 1956.

MLA (9th ed.) Citation

Colby, C. B. America's Natural Wonders: Strange Forests, Mysterious Caverns and Amazing Formations. Coward-McCann, 1956.