APA (7th ed.) Citation

Koch, P. R. (1987). A conceptual model for determining yield loss due to drought stress in sorghum. [publisher not identified].

Chicago Style (17th ed.) Citation

Koch, Paul Robert. A Conceptual Model for Determining Yield Loss Due to Drought Stress in Sorghum. [Place of publication not identified]: [publisher not identified], 1987.

MLA (9th ed.) Citation

Koch, Paul Robert. A Conceptual Model for Determining Yield Loss Due to Drought Stress in Sorghum. [publisher not identified], 1987.