DUNCKEL JACQUELINE. (1994). EFFECTIVE SPEAKING FOR BUSINESS SUCCESS MAKING CONFIDENT ... AND MORE. LANCER INTERNATIONAL.
Chicago-čujuhus (17. p.)DUNCKEL JACQUELINE. EFFECTIVE SPEAKING FOR BUSINESS SUCCESS MAKING CONFIDENT ... AND MORE. INDIA CANADA USA: LANCER INTERNATIONAL, 1994.
MLA-čujuhus (9. p.)DUNCKEL JACQUELINE. EFFECTIVE SPEAKING FOR BUSINESS SUCCESS MAKING CONFIDENT ... AND MORE. LANCER INTERNATIONAL, 1994.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.