Eisenstadt, S. N. (1969). The political systems of empires. Free Press ; Collier-Macmillan.
Lua i Stíl Chicago (17ú heag.)Eisenstadt, S. N. The Political Systems of Empires. New York : London: Free Press ; Collier-Macmillan, 1969.
Lua MLA (8ú heag.)Eisenstadt, S. N. The Political Systems of Empires. Free Press ; Collier-Macmillan, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.