Cita APA (7a ed.)

Soars, L., & Soars, J. (1997). Headway: Teacher's book intermediate (3th. ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Soars, Liz, y John Soars. Headway: Teacher's Book Intermediate. 3th. ed. Oxford: Oxford University Press, 1997.

Cita MLA (8a ed.)

Soars, Liz, y John Soars. Headway: Teacher's Book Intermediate. 3th. ed. Oxford University Press, 1997.