Cita APA

Gunther, J. 1., & Gunther, J. 1. (1969). Twelve cities. New York, New York: Harper and Row.

Citación estilo Chicago

Gunther, John 1901-1970, y John 1901-1970 Gunther. Twelve Cities. New York, New York: Harper and Row, 1969.

Cita MLA

Gunther, John 1901-1970, y John 1901-1970 Gunther. Twelve Cities. New York, New York: Harper and Row, 1969.