McGinnis, R. G., & McGinnis, R. G., Jr. (1991). Learning CADKEY. McGraw Hill.
Lua i Stíl Chicago (17ú heag.)McGinnis, Richard G., agus Richard G. McGinnis, Jr. Learning CADKEY. New York, N.Y.: McGraw Hill, 1991.
Lua MLA (8ú heag.)McGinnis, Richard G., agus Richard G. McGinnis, Jr. Learning CADKEY. McGraw Hill, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.