Cita APA (7a ed.)

Soars, L., & Soars, J. (1994). Headway. Teachers book: Elementary (3a. ed.). Oxford University.

Cita Chicago Style (17a ed.)

Soars, Liz, y John Soars. Headway. Teachers Book: Elementary. 3a. ed. Oxford: Oxford University, 1994.

Cita MLA (9a ed.)

Soars, Liz, y John Soars. Headway. Teachers Book: Elementary. 3a. ed. Oxford University, 1994.