Rowen, L. H. (1988). Ring theory. Academic Press.
Style de citation Chicago (17e éd.)Rowen, Louis Halle. Ring Theory. Boston [etc.]: Academic Press, 1988.
Style de citation MLA (8e éd.)Rowen, Louis Halle. Ring Theory. Academic Press, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.