एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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