APA Edition Citation

Estall, R. C. (1976). A modern geography of the United States : aspects of life and economy / Robert Estall: Aspects of life and economy (2nd ed.). Penguin.

Chicago Edition Citation

Estall, R. C. A Modern Geography of the United States : Aspects of Life and Economy / Robert Estall: Aspects of Life and Economy. 2nd ed. Harmondsworth: Penguin, 1976.

MLA Edition Citation

Estall, R. C. A Modern Geography of the United States : Aspects of Life and Economy / Robert Estall: Aspects of Life and Economy. 2nd ed. Penguin, 1976.