Παραπομπή APA

Howe, H. F., & Westley , L. C. (1988). Ecological relationships of plants and animals. OUP.

Παραπομπή Chicago Style

Howe, Henry F., και Lynn C. Westley. Ecological Relationships of Plants and Animals. New York: OUP, 1988.

Παραπομπή MLA

Howe, Henry F., και Lynn C. Westley. Ecological Relationships of Plants and Animals. OUP, 1988.