APA (7e ed.) Bronvermelding

Alexander, L. G. (1981). Mainline: A functional, notional approach. Progress B Teacher's Book. Longman Group Ltd.

Chicago (17e ed.) Bronvermelding

Alexander, L. G. Mainline: A Functional, Notional Approach. Progress B Teacher's Book. London: Longman Group Ltd, 1981.

MLA (9e ed.) Bronvermelding

Alexander, L. G. Mainline: A Functional, Notional Approach. Progress B Teacher's Book. Longman Group Ltd, 1981.