APA引文

Marc Helgesen. (1998). Office File (Student book). Essex, England: longman.

Trích dẫn kiểu Chicago

Marc Helgesen. Office File (Student Book). Essex, England: longman, 1998.

MLA引文

Marc Helgesen. Office File (Student Book). Essex, England: longman, 1998.

警告：這些引文格式不一定是100％准確.