Cita APA (7th ed.)
Viault, B. S. (1990). Modern European history. McGraw-Hill.
Cita Chicago (17th ed.)
Viault, Birdsall S. Modern European History. New York: McGraw-Hill, 1990.
Cita MLA (9th ed.)
Viault, Birdsall S. Modern European History. McGraw-Hill, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.