APA (7th ed.) Citation

Welch, C. D., Grey, C., & Smith, K. L. (1977). Crop fertilization on East Texas soils (9-77, revision.). Texas Agricultural Extension Service.

Chicago Style (17th ed.) Citation

Welch, C. D., Carl Grey, and Kenneth L. Smith. Crop Fertilization on East Texas Soils. 9-77, revision. College Station, [Texas]: Texas Agricultural Extension Service, 1977.

MLA (9th ed.) Citation

Welch, C. D., et al. Crop Fertilization on East Texas Soils. 9-77, revision. Texas Agricultural Extension Service, 1977.