APA引文

Nguyễn Thanh Ngọc. (2015). An investigation into the use of refusals in business correspondence in english.

Trích dẫn kiểu Chicago

Nguyễn Thanh Ngọc. An Investigation Into the Use of Refusals in Business Correspondence in English. 2015.

MLA引文

Nguyễn Thanh Ngọc. An Investigation Into the Use of Refusals in Business Correspondence in English. 2015.

警告：这些引文格式不一定是100％准确.