Cita APA (7a ed.)

Eisenstadt, S. N. (1969). The political systems of empires. Free Press.

Cita Chicago Style (17a ed.)

Eisenstadt, S. N. The Political Systems of Empires. New York: Free Press, 1969.

Cita MLA (9a ed.)

Eisenstadt, S. N. The Political Systems of Empires. Free Press, 1969.