Cita APA

Estall, R. C. (1976). A modern geography of the United States: Aspects of life and economy (2a. ed.). New York: Peguin Books.

Citación estilo Chicago

Estall, Robert C. A Modern Geography of the United States: Aspects of Life and Economy. 2a. ed. New York: Peguin Books, 1976.

Cita MLA

Estall, Robert C. A Modern Geography of the United States: Aspects of Life and Economy. 2a. ed. New York: Peguin Books, 1976.