APA

Gilbert O. L., . (1989). The ecology of urban habitats. New York: Chapman and Hall.

Chicago

Gilbert O L, . 1989. The ecology of urban habitats. New York: Chapman and Hall.

Harvard

Gilbert O. L., . (1989). The ecology of urban habitats. New York: Chapman and Hall.

MLA

Gilbert O L, . The ecology of urban habitats. New York: Chapman and Hall. 1989.