Nichols, R. G., & Stevens, L. A. (1957). Are you listening? (ed.). Mc Graw Hill Book Co..
Lua i Stíl Chicago (17ú heag.)Nichols, Ralph G., agus Leonard A. Stevens. Are You Listening? ed. New York: Mc Graw Hill Book Co., 1957.
Lua MLA (9ú heag.)Nichols, Ralph G., agus Leonard A. Stevens. Are You Listening? ed. Mc Graw Hill Book Co., 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.