Dunckel, J. (1994). Business etiquette. Lancer.
Lua i Stíl Chicago (17ú heag.)Dunckel, Jacqueline. Business Etiquette. New delhi: Lancer, 1994.
Lua MLA (9ú heag.)Dunckel, Jacqueline. Business Etiquette. Lancer, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.