Cita APA (7th ed.)

Wright, A. J. (1948). United States and Canada: An economic geography. Appleton-Century-Crofts.

Cita Chicago (17th ed.)

Wright, Alfred James. United States and Canada: An Economic Geography. New York: Appleton-Century-Crofts, 1948.

Cita MLA (9th ed.)

Wright, Alfred James. United States and Canada: An Economic Geography. Appleton-Century-Crofts, 1948.