Marx, K., & McLellan, D. (1977). Selected writings. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Marx, Karl, agus David McLellan. Selected Writings. [Oxford [Eng: Oxford University Press, 1977.
Lua MLA (9ú heag.)Marx, Karl, agus David McLellan. Selected Writings. Oxford University Press, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.