Sabine, G. H. (1958). Marxism. Cornell University Press.
Lua i Stíl Chicago (17ú heag.)Sabine, George Holland. Marxism. Ithaca, N.Y: Cornell University Press, 1958.
Lua MLA (9ú heag.)Sabine, George Holland. Marxism. Cornell University Press, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.