Nichols, R. G., & Stevens, L. A. (1957). Are you listening? McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Nichols, Ralph G., agus Leonard A. Stevens. Are You Listening? New York: McGraw-Hill, 1957.
Lua MLA (8ú heag.)Nichols, Ralph G., agus Leonard A. Stevens. Are You Listening? McGraw-Hill, 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.