Παραπομπή APA

Mcneill, W. H., & Sedlar, J. W. (1981). Origins of civilization. Oxford University Press.

Παραπομπή Chicago Style

Mcneill, Wiliam H., και Jean W. Sedlar. Origins of Civilization. NewYork: Oxford University Press, 1981.

Παραπομπή MLA

Mcneill, Wiliam H., και Jean W. Sedlar. Origins of Civilization. Oxford University Press, 1981.