APA (7th ed.) Citation

Paul, H. G., & Kincheloe, I. M. (1940). Units in English. Lyons & Carnahan.

Chicago Style (17th ed.) Citation

Paul, H. G., and Isabel Mary Kincheloe. Units in English. Chicago ; Dallas [etc.]: Lyons & Carnahan, 1940.

MLA (8th ed.) Citation

Paul, H. G., and Isabel Mary Kincheloe. Units in English. Lyons & Carnahan, 1940.