Cita APA

Marc Helgesen. (1997). Travel file (Student book). Essex, England: Longman.

Chicago Style Citation

Marc Helgesen. Travel File (Student Book). Essex, England: Longman, 1997.

Cita MLA

Marc Helgesen. Travel File (Student Book). Essex, England: Longman, 1997.

Atenció: Aquestes cites poden no estar 100% correctes.