APA (7th ed.) Citation

Widtsoe, J. A. (1921). Dry-farming: A system of agriculture for countries under a low rainfall. The Macmillan Co..

Chicago Style (17th ed.) Citation

Widtsoe, John Andreas. Dry-farming: A System of Agriculture for Countries Under a Low Rainfall. New York: The Macmillan Co., 1921.

MLA (9th ed.) Citation

Widtsoe, John Andreas. Dry-farming: A System of Agriculture for Countries Under a Low Rainfall. The Macmillan Co., 1921.