APA (7th ed.) Citation

Jones, L. G., & Cowley, W. R. (1940). Laboratory manual for agronomy 301: Introductory soils. Agricultural and Mechanical College of Texas.

Chicago Style (17th ed.) Citation

Jones, L. G., and W. R. Cowley. Laboratory Manual for Agronomy 301: Introductory Soils. College Station, Tex.: Agricultural and Mechanical College of Texas, 1940.

MLA (9th ed.) Citation

Jones, L. G., and W. R. Cowley. Laboratory Manual for Agronomy 301: Introductory Soils. Agricultural and Mechanical College of Texas, 1940.