APA ציטוט

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

Trích dẫn kiểu Chicago

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

ציטוט MLA

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