Martin, R. (1963). Practical speech for Modern Business. Century coffe.
Lua i Stíl Chicago (17ú heag.)Martin, Robinson. Practical Speech for Modern Business. Appleton: Century coffe, 1963.
Lua MLA (9ú heag.)Martin, Robinson. Practical Speech for Modern Business. Century coffe, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.