APA (7th ed.) Citation

Fraps, G. S., Ogier, T. L., & Asbury, S. E. (1939). Commercial fertilizers in 1938-39 and their uses. Texas Agricultural Experiment Station.

Chicago Style (17th ed.) Citation

Fraps, G. S., T. L. Ogier, and S. E. Asbury. Commercial Fertilizers in 1938-39 and Their Uses. College Station, Tex.: Texas Agricultural Experiment Station, 1939.

MLA (9th ed.) Citation

Fraps, G. S., et al. Commercial Fertilizers in 1938-39 and Their Uses. Texas Agricultural Experiment Station, 1939.