Cita APA

Buchanan, W. 1., & Buchanan, W. 1. (1969). Understanding political variables. New York, New York: Scribner.

Citación estilo Chicago

Buchanan, William 1918-, y William 1918- Buchanan. Understanding Political Variables. New York, New York: Scribner, 1969.

Cita MLA

Buchanan, William 1918-, y William 1918- Buchanan. Understanding Political Variables. New York, New York: Scribner, 1969.