Cita APA (7a ed.)

Soars, J., & Soars, L. (1989). Headway: Student's book : advanced. Oxford University Press.

Cita Chicago Style (17a ed.)

Soars, John, y Liz Soars. Headway: Student's Book : Advanced. Oxford: Oxford University Press, 1989.

Cita MLA (9a ed.)

Soars, John, y Liz Soars. Headway: Student's Book : Advanced. Oxford University Press, 1989.