Cita APA

Ahlgren, G. H. 1. (1956). Forage crops McGraw-Hill.

Citación estilo Chicago

Ahlgren, Gilbert H. 1913-. Forage Crops. 2nd ed. New York: McGraw-Hill, 1956.

Cita MLA

Ahlgren, Gilbert H. 1913-. Forage Crops. 2nd ed. New York: McGraw-Hill, 1956.