APA (7th ed.) Citation

Gray, C., Anderson, W. B., & Welch, C. D. (1990). Iron and zinc deficiencies in field crops (4-90, Reprint.). Texas Agricultural Extension Service.

Chicago Style (17th ed.) Citation

Gray, Carl, W. B. Anderson, and C. D. Welch. Iron and Zinc Deficiencies in Field Crops. 4-90, Reprint. College Station, Texas: Texas Agricultural Extension Service, 1990.

MLA (9th ed.) Citation

Gray, Carl, et al. Iron and Zinc Deficiencies in Field Crops. 4-90, Reprint. Texas Agricultural Extension Service, 1990.