Cita APA

Soars, L., & Soars, J. (1998). New Headway English Course, Upper-Intermediate: Student's Book. Oxford: Oxford University Press.

Chicago Style Citation

Soars, Liz, i John Soars. New Headway English Course, Upper-Intermediate: Student's Book. Oxford: Oxford University Press, 1998.

Cita MLA

Soars, Liz, i John Soars. New Headway English Course, Upper-Intermediate: Student's Book. Oxford: Oxford University Press, 1998.