Duke, D. (1990). Teaching an introduction. Mc Graw Hill.
Lua i Stíl Chicago (17ú heag.)Duke, Daniel. Teaching an Introduction. New York: Mc Graw Hill, 1990.
Lua MLA (9ú heag.)Duke, Daniel. Teaching an Introduction. Mc Graw Hill, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.