Cita APA (7a ed.)

Marx, K., & Engels, F. (2001). Marx & Engels Collected Works Vol 49: Engels:1890-1892. Lawrence & Wishart.

Cita Chicago Style (17a ed.)

Marx, Karl, y Friedrich Engels. Marx & Engels Collected Works Vol 49: Engels:1890-1892. London [England]: Lawrence & Wishart, 2001.

Cita MLA (8a ed.)

Marx, Karl, y Friedrich Engels. Marx & Engels Collected Works Vol 49: Engels:1890-1892. Lawrence & Wishart, 2001.