Style de citation APA (7e éd.)
Soars, J. a. L. (1991). Headway. Upper-Intermediate: Teacher's Book (5.impression.). Oxford University Press.
Style de citation Chicago (17e éd.)
Soars, John and Liz. Headway. Upper-Intermediate: Teacher's Book. 5.impression. Oxford: Oxford University Press, 1991.
Style de citation MLA (9e éd.)
Soars, John and Liz. Headway. Upper-Intermediate: Teacher's Book. 5.impression. Oxford University Press, 1991.
Attention : ces citations peuvent ne pas être correctes à 100%.