APA (7th ed.) Citation

Engels, F. (1939). Herr Eugen Duhring's revolution in science / by F. Engels. International.

Chicago Style (17th ed.) Citation

Engels, Friedrich. Herr Eugen Duhring's Revolution in Science / by F. Engels. International, 1939.

MLA (9th ed.) Citation

Engels, Friedrich. Herr Eugen Duhring's Revolution in Science / by F. Engels. International, 1939.

Warning: These citations may not always be 100% accurate.