Aurner, R. R. (1930). Review of effective business correspondence. South-western Publishing Co..
Lua i Stíl Chicago (17ú heag.)Aurner, Robert Ray. Review of Effective Business Correspondence. Cincinnati : New York [etc.]: South-western Publishing Co., 1930.
Lua MLA (8ú heag.)Aurner, Robert Ray. Review of Effective Business Correspondence. South-western Publishing Co., 1930.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.