APA (7th ed.) Citation

Onken, A. B., Matheson, R., & Williams, E. J. (1979). Soil testing for phosphorus on the Texas high plains. Texas Agricultural Experiment Station, Texas A & M University System.

Chicago Style (17th ed.) Citation

Onken, Arthur B., Richard Matheson, and E. Jay Williams. Soil Testing for Phosphorus on the Texas High Plains. College Station: Texas Agricultural Experiment Station, Texas A & M University System, 1979.

MLA (9th ed.) Citation

Onken, Arthur B., et al. Soil Testing for Phosphorus on the Texas High Plains. Texas Agricultural Experiment Station, Texas A & M University System, 1979.