APA (7th ed.) Citation

Marx, K., Marx, K., & Engels, F. (1996). Capital (2. ed., 6. print.). Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

Marx, Karl, Karl Marx, and Friedrich Engels. Capital. 2. ed., 6. print. Chicago u.a: Encyclopaedia Britannica, 1996.

MLA (9th ed.) Citation

Marx, Karl, et al. Capital. 2. ed., 6. print. Encyclopaedia Britannica, 1996.