APA

Boucher D. H., . (19881985). The Biology of mutualism: ecology and evolution. New York: Oxford University Press.

Chicago

Boucher Douglas H, . 19881985. The Biology of mutualism: ecology and evolution. New York: Oxford University Press.

Harvard

Boucher D. H., . (19881985). The Biology of mutualism: ecology and evolution. New York: Oxford University Press.

MLA

Boucher Douglas H, . The Biology of mutualism: ecology and evolution. New York: Oxford University Press. 19881985.