Cita APA (7th ed.)

Riazanov, D. (1973). Karl Marx and Friedrich Engels: An introduction to their lives and work. Monthly Review Press.

Cita Chicago (17th ed.)

Riazanov, David. Karl Marx and Friedrich Engels: An Introduction to Their Lives and Work. Nueva York: Monthly Review Press, 1973.

Cita MLA (9th ed.)

Riazanov, David. Karl Marx and Friedrich Engels: An Introduction to Their Lives and Work. Monthly Review Press, 1973.