Đặng Thị Phương Trang. (2012). A Study on Ways Expressing Politeness in Bad news Business Letters in English. Khoa Anh CN.
استشهاد بنمط شيكاغوĐặng Thị Phương Trang. A Study On Ways Expressing Politeness in Bad News Business Letters in English. Khoa Anh CN, 2012.
MLA استشهادĐặng Thị Phương Trang. A Study On Ways Expressing Politeness in Bad News Business Letters in English. Khoa Anh CN, 2012.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.