APA (7th ed.) Zitazioa

Freeman, J. F. (2008). High Plains horticulture: A history. University Press of Colorado.

Chicago Style (17th ed.) Zitazioa

Freeman, John F. High Plains Horticulture: A History. Boulder: University Press of Colorado, 2008.

MLA (9th ed.) Zitazioa

Freeman, John F. High Plains Horticulture: A History. University Press of Colorado, 2008.