APA (7th ed.) Citation

Caldwell, E., & Bourke-White, M. (1939). North of the Danube. Viking Press.

Chicago Style (17th ed.) Citation

Caldwell, Erskine, and Margaret Bourke-White. North of the Danube. New York: Viking Press, 1939.

MLA (9th ed.) Citation

Caldwell, Erskine, and Margaret Bourke-White. North of the Danube. Viking Press, 1939.