Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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