APA (7th ed.) Citation

Martin, O. B. (1941). The demonstration work: Dr. Seaman A. Knapp's contribution to civilization (3rd ed.). Naylor.

Chicago Style (17th ed.) Citation

Martin, O. B. The Demonstration Work: Dr. Seaman A. Knapp's Contribution to Civilization. 3rd ed. San Antonio, Tex.: Naylor, 1941.

MLA (9th ed.) Citation

Martin, O. B. The Demonstration Work: Dr. Seaman A. Knapp's Contribution to Civilization. 3rd ed. Naylor, 1941.