APA引文

Đặng Thị Thu Trang. (2012). A Study on Ways Expressing Politeness in Bad news Business Letters in English.

Trích dẫn kiểu Chicago

Đặng Thị Thu Trang. A Study On Ways Expressing Politeness in Bad News Business Letters in English. 2012.

MLA引文

Đặng Thị Thu Trang. A Study On Ways Expressing Politeness in Bad News Business Letters in English. 2012.

警告：這些引文格式不一定是100％准確.