Cita APA

Marx,Karl, & Engels,Frederick. (1980). Karl Marx Frederick Engels: Collected works. Progress Publishers.

Chicago Edition Citation

Marx,Karl, i Engels,Frederick. Karl Marx Frederick Engels: Collected Works. Moscow: Progress Publishers, 1980.

Cita MLA

Marx,Karl, i Engels,Frederick. Karl Marx Frederick Engels: Collected Works. Progress Publishers, 1980.

Atenció: Aquestes cites poden no estar 100% correctes.