Cita APA

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

Chicago Style Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.