APA

Proctor M. C. F., Yeo P., . (1973). The pollination of flowers. London: Collins.

Chicago

Proctor M C F, Yeo Peter, . 1973. The pollination of flowers. London: Collins.

Harvard

Proctor M. C. F., Yeo P., . (1973). The pollination of flowers. London: Collins.

MLA

Proctor M C F, Yeo Peter, . The pollination of flowers. London: Collins. 1973.