APA (7th ed.) Citation

Spence, C. O., & Welch, C. D. (1977). Phosphorus fertilization for grain sorghum production in the Texas Blacklands. [Texas Agricultural Extension Service].

Chicago Style (17th ed.) Citation

Spence, Charles Orvel, and C. D. Welch. Phosphorus Fertilization for Grain Sorghum Production in the Texas Blacklands. [College Station, Texas]: [Texas Agricultural Extension Service], 1977.

MLA (9th ed.) Citation

Spence, Charles Orvel, and C. D. Welch. Phosphorus Fertilization for Grain Sorghum Production in the Texas Blacklands. [Texas Agricultural Extension Service], 1977.