Cita APA

Riley, L., & Riley, W. 1. (1992). Guide to the national wildlife refuges (Revised and expanded.). New York, N.Y., USA: Macmillan.

Citación estilo Chicago

Riley, Laura, y William 1931- Riley. Guide to the National Wildlife Refuges. Revised and expanded. New York, N.Y., USA: Macmillan, 1992.

Cita MLA

Riley, Laura, y William 1931- Riley. Guide to the National Wildlife Refuges. Revised and expanded. New York, N.Y., USA: Macmillan, 1992.