Petrovic, G. (1967). Marx in the mid- twentieth century. New York: Doubleday & Company, Inc.
Trích dẫn kiểu ChicagoPetrovic, Gajo. Marx in the Mid- Twentieth Century. New York: Doubleday & Company, Inc, 1967.
MLA CitationPetrovic, Gajo. Marx in the Mid- Twentieth Century. New York: Doubleday & Company, Inc, 1967.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.