APA (7th ed.) Citation

Marx, C., & Engels, F. (1947). Correspondencia. Problemas.

Chicago Style (17th ed.) Citation

Marx, Carlos, and Friedrich Engels. Correspondencia. Buenos Aires: Problemas, 1947.

MLA (9th ed.) Citation

Marx, Carlos, and Friedrich Engels. Correspondencia. Problemas, 1947.

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