APA (7th ed.) Citation

DeVinne, T. L., & Caffee, R. H. (1930). The last thing to learn is simplicity. The Laboratory Press.

Chicago Style (17th ed.) Citation

DeVinne, Theodore Low, and Robert H. Caffee. The Last Thing to Learn Is Simplicity. Pittsburgh: The Laboratory Press, 1930.

MLA (9th ed.) Citation

DeVinne, Theodore Low, and Robert H. Caffee. The Last Thing to Learn Is Simplicity. The Laboratory Press, 1930.