Mortimer, C. (1988). Elements of Pronunciation: Intensive Practice for Intermediate and More Advanced Students. Sông Bé: Tổng hợp.
Παραπομπή Chicago StyleMortimer, Collin. Elements of Pronunciation: Intensive Practice for Intermediate and More Advanced Students. Sông Bé: Tổng hợp, 1988.
Παραπομπή MLAMortimer, Collin. Elements of Pronunciation: Intensive Practice for Intermediate and More Advanced Students. Sông Bé: Tổng hợp, 1988.
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