Παραπομπή σε μορφή APA (7η εκδ.)

Cooper, B., & Voegelin, E. (1999). Eric Voegelin and the foundations of modern political science. University of Missouri Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Cooper, Barry, και Eric Voegelin. Eric Voegelin and the Foundations of Modern Political Science. Columbia: University of Missouri Press, 1999.

Παραπομπή σε μορφή MLA (9th εκδ.)

Cooper, Barry, και Eric Voegelin. Eric Voegelin and the Foundations of Modern Political Science. University of Missouri Press, 1999.