Marx, K. (1992). Early writings. Penguin Books.
Lua i Stíl Chicago (17ú heag.)Marx, Karl. Early Writings. London: Penguin Books, 1992.
Lua MLA (9ú heag.)Marx, Karl. Early Writings. Penguin Books, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.