Cita APA (7th ed.)
Modell, S. (1974). A history of the western world. Prentice Hall.
Cita Chicago (17th ed.)
Modell, Solomon. A History of the Western World. New Jersey: Prentice Hall, 1974.
Cita MLA (9th ed.)
Modell, Solomon. A History of the Western World. Prentice Hall, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.