Wolff, R. P. (1985). Understanding Marx: A reconstruction and critique of capital. Basil Blackwell.
Lua i Stíl Chicago (17ú heag.)Wolff, Robert Paul. Understanding Marx: A Reconstruction and Critique of Capital. Oxford: Basil Blackwell, 1985.
Lua MLA (9ú heag.)Wolff, Robert Paul. Understanding Marx: A Reconstruction and Critique of Capital. Basil Blackwell, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.