Gaya APA

Sabine, G, H., Thorson, T, L. (1973). A History of Political Theory (Ed.4). United States of America: The Dryden Press.

Gaya MLA

Sabine, George, H.., Thorson, Thomas, Landon. "A History of Political Theory". Ed.4 United States of America: The Dryden Press, 1973. Text.