APA (7th ed.) Citation

EISENSTADT, S. (1969). The political system of empires. Free Press.

Chicago Style (17th ed.) Citation

EISENSTADT, S.N. The Political System of Empires. New York: Free Press, 1969.

MLA (9th ed.) Citation

EISENSTADT, S.N. The Political System of Empires. Free Press, 1969.