APA (7th ed.) Citation

Colbert, E. H. (1961). Dinosaurs: Their discovery and their world (First edition.). Dutton.

Chicago Style (17th ed.) Citation

Colbert, Edwin H. Dinosaurs: Their Discovery and Their World. First edition. New York: Dutton, 1961.

MLA (9th ed.) Citation

Colbert, Edwin H. Dinosaurs: Their Discovery and Their World. First edition. Dutton, 1961.