Cita APA (7a ed.)

Serviss,George H, & Ahlgren,Gilbert H. (1955). Grassland farming (1st edition.). John Wiley & Sons.

Cita Chicago Style (17a ed.)

Serviss,George H, y Ahlgren,Gilbert H. Grassland Farming. 1st edition. New York: John Wiley & Sons, 1955.

Cita MLA (8a ed.)

Serviss,George H, y Ahlgren,Gilbert H. Grassland Farming. 1st edition. John Wiley & Sons, 1955.