Citazione Stile APA (7a Edizione)

Ulmen, G. L. (1978). The science of society: Toward an understanding of the life and work of Karl August Wittfogel. Mouton Publ..

Citazione stile Chigago Style (17a edizione)

Ulmen, G. L. The Science of Society: Toward an Understanding of the Life and Work of Karl August Wittfogel. The Hague: Mouton Publ., 1978.

Citatione MLA (9a ed.)

Ulmen, G. L. The Science of Society: Toward an Understanding of the Life and Work of Karl August Wittfogel. Mouton Publ., 1978.