Cita APA

Soars, J., & Soars, L. (1991). Headway: Pre-intermediate students book. Oxford: Oxford University Press.

Citación estilo Chicago

Soars, John, and Liz Soars. Headway: Pre-intermediate Students Book. Oxford: Oxford University Press, 1991.

Cita MLA

Soars, John, and Liz Soars. Headway: Pre-intermediate Students Book. Oxford: Oxford University Press, 1991.