Cita APA

Sterling, K. B. (1997). Biographical dictionary of American and Canadian naturalists and environmentalists. Greenwood Press.

Citación estilo Chicago

Sterling, Keir B. Biographical Dictionary of American and Canadian Naturalists and Environmentalists. Westport, Conn: Greenwood Press, 1997.

Cita MLA

Sterling, Keir B. Biographical Dictionary of American and Canadian Naturalists and Environmentalists. Greenwood Press, 1997.