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Dyfyniad Arddull ChicagoSally, Chew. TIMES ASIAN BUSINESS LIBRARY BUSINESS ETIQUETTE: An Essential Guide for Executives. Singapore : Time Books International, 1992.
Dyfyniad MLASally, Chew. TIMES ASIAN BUSINESS LIBRARY BUSINESS ETIQUETTE: An Essential Guide for Executives. Singapore : Time Books International, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.