APA

Proctor M., Yeo P. F. & Lack A. (1996). The natural history of pollination. Portland, Oregon: Timber Press.

Chicago

Proctor Michael, Yeo Peter F and Lack Andrew. 1996. The natural history of pollination. Portland, Oregon: Timber Press.

Harvard

Proctor M., Yeo P. F. and Lack A. (1996). The natural history of pollination. Portland, Oregon: Timber Press.

MLA

Proctor Michael, Yeo Peter F and Lack Andrew. The natural history of pollination. Portland, Oregon: Timber Press. 1996.