APA (7th ed.) Citation

Karper, R. E. (1931). Grain sorghum date-of-planting and spacing experiments. Texas Agricultural Experiment Station.

Chicago Style (17th ed.) Citation

Karper, R. E. Grain Sorghum Date-of-planting and Spacing Experiments. College Station, Tex.: Texas Agricultural Experiment Station, 1931.

MLA (9th ed.) Citation

Karper, R. E. Grain Sorghum Date-of-planting and Spacing Experiments. Texas Agricultural Experiment Station, 1931.