Engels. (1954). Dialectics of Nature (1st (2nd-1954).). Progress Publishers.
Chicago Edition CitationEngels. Dialectics of Nature. 1st (2nd-1954). Moscow: Progress Publishers, 1954.
Cita MLAEngels. Dialectics of Nature. 1st (2nd-1954). Progress Publishers, 1954.
Atenció: Aquestes cites poden no estar 100% correctes.