McCoy, N. H. (1964). The theory of rings. The Macmillan Company.
Lua i Stíl Chicago (17ú heag.)McCoy, Neal H. The Theory of Rings. New York: The Macmillan Company, 1964.
Lua MLA (9ú heag.)McCoy, Neal H. The Theory of Rings. The Macmillan Company, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.