Engels, F. (1964). Dialectics of nature: Frederick Engels. -- (3rd rev. ed. -.). Progress.
Cita Chicago (17th ed.)Engels, Frederick. Dialectics of Nature: Frederick Engels. --. 3rd rev. ed. -. - Moscow: Progress, 1964.
Cita MLA (9th ed.)Engels, Frederick. Dialectics of Nature: Frederick Engels. --. 3rd rev. ed. -. Progress, 1964.
Atenció: Aquestes cites poden no estar 100% correctes.