Cita APA (7a ed.)
Trefousse, H. L. (1968). Twayne's Rulers and Statesmen of the World Series. Twayne.
Cita Chicago Style (17a ed.)
Trefousse, Hans Louis. Twayne's Rulers and Statesmen of the World Series. New York: Twayne, 1968.
Cita MLA (9a ed.)
Trefousse, Hans Louis. Twayne's Rulers and Statesmen of the World Series. Twayne, 1968.
Precaución: Estas citas no son 100% exactas.