APA (7th ed.) Citation

Pennington, D., Grey, C., & Onken, A. B. (1968). Crop fertilization on Texas High Plains soils (12-81, Revision.). Texas A&M University, Agricultural Extension Service.

Chicago Style (17th ed.) Citation

Pennington, Dale, Carl Grey, and Arthur B. Onken. Crop Fertilization on Texas High Plains Soils. 12-81, Revision. College Station, [Texas]: Texas A&M University, Agricultural Extension Service, 1968.

MLA (9th ed.) Citation

Pennington, Dale, et al. Crop Fertilization on Texas High Plains Soils. 12-81, Revision. Texas A&M University, Agricultural Extension Service, 1968.