Style de citation APA (7e éd.)
Soars, L., Soars, J., & Devoy, J. (1998). New Headway English course. Upper-intermediate. Woorkbook with key (1. publish., [dotlač].). Oxford University Press.
Style de citation Chicago (17e éd.)
Soars, Liz, John Soars, et Jo Devoy. New Headway English Course. Upper-intermediate. Woorkbook with Key. 1. publish., [dotlač]. Oxford: Oxford University Press, 1998.
Style de citation MLA (9e éd.)
Soars, Liz, et al. New Headway English Course. Upper-intermediate. Woorkbook with Key. 1. publish., [dotlač]. Oxford University Press, 1998.
Attention : ces citations peuvent ne pas être correctes à 100%.