Whalen, D. (1978). handbook for business writers. Hartcourt Brauce Jovanovich.
Lua i Stíl Chicago (17ú heag.)Whalen, Doris. Handbook for Business Writers. New York: Hartcourt Brauce Jovanovich, 1978.
Lua MLA (9ú heag.)Whalen, Doris. Handbook for Business Writers. Hartcourt Brauce Jovanovich, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.