Cita APA (7th ed.)
Marx, K. (1972). The Karl Marx library. McGraw-Hill.
Cita Chicago (17th ed.)
Marx, Karl. The Karl Marx Library. New York: McGraw-Hill, 1972.
Cita MLA (9th ed.)
Marx, Karl. The Karl Marx Library. McGraw-Hill, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.