Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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