Regents pub. co. (1977). The Blue book of business English. Regent Pub.
Lua i Stíl Chicago (17ú heag.)Regents pub. co. The Blue Book of Business English. New york: Regent Pub, 1977.
Lua MLA (9ú heag.)Regents pub. co. The Blue Book of Business English. Regent Pub, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.