Cita APA (7a ed.)
Alexander, L. G. (1989). First Things First: An integrated course for beginners. Longman Group UK.
Cita Chicago Style (17a ed.)
Alexander, Louis George. First Things First: An Integrated Course for Beginners. Essex: Longman Group UK, 1989.
Cita MLA (9a ed.)
Alexander, Louis George. First Things First: An Integrated Course for Beginners. Longman Group UK, 1989.
Precaución: Estas citas no son 100% exactas.