APA (7th ed.) Citation

Harding, T. S. (1947). Two blades of grass: A history of scientific development in the U.S. Department of agriculture. University of Oklahoma Press.

Chicago Style (17th ed.) Citation

Harding, T. Swann. Two Blades of Grass: A History of Scientific Development in the U.S. Department of Agriculture. Norman: University of Oklahoma Press, 1947.

MLA (9th ed.) Citation

Harding, T. Swann. Two Blades of Grass: A History of Scientific Development in the U.S. Department of Agriculture. University of Oklahoma Press, 1947.