DUNCKEL JACQUELINE. (1994). BUSINESS ETIQUETTE: MAKE A GOOD IMPRESION - GAIN THE COMPETITIVE EDGE. LANCER INTERNATIONAL.
Čikaški stil citiranja (17. izdanje)DUNCKEL JACQUELINE. BUSINESS ETIQUETTE: MAKE A GOOD IMPRESION - GAIN THE COMPETITIVE EDGE. INDIA,CANADA,USA: LANCER INTERNATIONAL, 1994.
MLA način citiranja (9. izdanje)DUNCKEL JACQUELINE. BUSINESS ETIQUETTE: MAKE A GOOD IMPRESION - GAIN THE COMPETITIVE EDGE. LANCER INTERNATIONAL, 1994.
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