APA (7th ed.) Citation

Welch, C. D., & Grey, C. (1976). Zinc deficiency and fertilization (4-76, revised.). Texas Agricultural Extension Service.

Chicago Style (17th ed.) Citation

Welch, C. D., and Carl Grey. Zinc Deficiency and Fertilization. 4-76, revised. College Station, [Texas]: Texas Agricultural Extension Service, 1976.

MLA (9th ed.) Citation

Welch, C. D., and Carl Grey. Zinc Deficiency and Fertilization. 4-76, revised. Texas Agricultural Extension Service, 1976.