Cita APA (7a ed.)

Soars, L., & Soars, J. (1996). Headway. Students book: Elementary (6a. ed.). Oxford University.

Cita Chicago Style (17a ed.)

Soars, Liz, y John Soars. Headway. Students Book: Elementary. 6a. ed. Oxford: Oxford University, 1996.

Cita MLA (9a ed.)

Soars, Liz, y John Soars. Headway. Students Book: Elementary. 6a. ed. Oxford University, 1996.