APA استشهاد

Engels. (1954). Dialectics of Nature (1st (2nd-1954).). Progress Publishers.

استشهاد بنمط شيكاغو

Engels. Dialectics of Nature. 1st (2nd-1954). Moscow: Progress Publishers, 1954.

MLA استشهاد

Engels. Dialectics of Nature. 1st (2nd-1954). Progress Publishers, 1954.