Cita APA (7a ed.)

Marx, K., & Engels, F. (2014). Marx & Engels Collected Works Vol 33: Marx:1861-1863. Project Muse.

Cita Chicago Style (17a ed.)

Marx, Karl, y Friedrich Engels. Marx & Engels Collected Works Vol 33: Marx:1861-1863. Baltimore, Maryland: Project Muse, 2014.

Cita MLA (8a ed.)

Marx, Karl, y Friedrich Engels. Marx & Engels Collected Works Vol 33: Marx:1861-1863. Project Muse, 2014.