Cita APA (7a ed.)

Marx, K., & Engels, F. (1985). Marx & Engels Collected Works Vol 21: Marx and Engels:1867-1870. Lawrence & Wishart.

Cita Chicago Style (17a ed.)

Marx, Karl, y Friedrich Engels. Marx & Engels Collected Works Vol 21: Marx and Engels:1867-1870. London [England]: Lawrence & Wishart, 1985.

Cita MLA (8a ed.)

Marx, Karl, y Friedrich Engels. Marx & Engels Collected Works Vol 21: Marx and Engels:1867-1870. Lawrence & Wishart, 1985.