Cita APA (7a ed.)

Serviss, G. H., & Ahlgren, G. H. (1955). Grassland farming. John Wiley.

Cita Chicago Style (17a ed.)

Serviss, George H., y Gilbert H. Ahlgren. Grassland Farming. New York: John Wiley, 1955.

Cita MLA (8a ed.)

Serviss, George H., y Gilbert H. Ahlgren. Grassland Farming. John Wiley, 1955.