Frailey, L. (1982). Handbook of business letters (2nd.). Super book house.
Lua i Stíl Chicago (17ú heag.)Frailey, L. Handbook of Business Letters. 2nd. Bombay: Super book house, 1982.
Lua MLA (9ú heag.)Frailey, L. Handbook of Business Letters. 2nd. Super book house, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.