Cita APA (7a ed.)
Alexander, L. G. (1980). First things first: Students Book. An Integrated Course for Beginners (27. vyd.). Longman.
Cita Chicago Style (17a ed.)
Alexander, Louis George. First Things First: Students Book. An Integrated Course for Beginners. 27. vyd. Londýn: Longman, 1980.
Cita MLA (9a ed.)
Alexander, Louis George. First Things First: Students Book. An Integrated Course for Beginners. 27. vyd. Longman, 1980.
Precaución: Estas citas no son 100% exactas.