APA aipamena

Buchanan, W. (1988). Understanding political variables (4th ed.). Macmillan Pub. Co.

Chicago Style aipamena

Buchanan, William. Understanding Political Variables. 4th ed. New York: Macmillan Pub. Co, 1988.

MLA aipamena

Buchanan, William. Understanding Political Variables. 4th ed. Macmillan Pub. Co, 1988.