Cita APA (7a ed.)

Widtsoe, J. A. (1911). Dry-farming. A system of agriculture for countries under a low rainfall. McMillan.

Cita Chicago Style (17a ed.)

Widtsoe, John A. Dry-farming. A System of Agriculture for Countries Under a Low Rainfall. New York: McMillan, 1911.

Cita MLA (9a ed.)

Widtsoe, John A. Dry-farming. A System of Agriculture for Countries Under a Low Rainfall. McMillan, 1911.