Cita APA

Soars, J., & Soars, L. (2013). New Headway Upper Intermediate: Student (4a. ed.). Oxford: Oxford University Press.

Citación estilo Chicago

Soars, John, and Liz Soars. New Headway Upper Intermediate: Student. 4a. ed. Oxford: Oxford University Press, 2013.

Cita MLA

Soars, John, and Liz Soars. New Headway Upper Intermediate: Student. 4a. ed. Oxford: Oxford University Press, 2013.