APA (7th ed.) Zitazioa

McGregor, S. E. (1976). Insect pollination of cultivated crop plants. Agricultural Research Service.

Chicago Style (17th ed.) Zitazioa

McGregor, Samuel Emmett. Insect Pollination of Cultivated Crop Plants. Washington, D.C, USA: Agricultural Research Service, 1976.

MLA (9th ed.) Zitazioa

McGregor, Samuel Emmett. Insect Pollination of Cultivated Crop Plants. Agricultural Research Service, 1976.