Farrer, D. (1975). The Warburgs: The story of a family. Stein and Day.
Cita Chicago (17th ed.)Farrer, David. The Warburgs: The Story of a Family. New York: Stein and Day, 1975.
Cita MLA (8th ed.)Farrer, David. The Warburgs: The Story of a Family. Stein and Day, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.