APA (7th ed.) Citation

Kelly, J. W., & Knapp, W. A. (1932). How to avoid faulty concrete in small structures. Purdue University.

Chicago Style (17th ed.) Citation

Kelly, Joe Wallace, and Willard Alfred Knapp. How to Avoid Faulty Concrete in Small Structures. Lafayette, Ind.: Purdue University, 1932.

MLA (9th ed.) Citation

Kelly, Joe Wallace, and Willard Alfred Knapp. How to Avoid Faulty Concrete in Small Structures. Purdue University, 1932.