Cita APA (7a ed.)

Soars, J., & Soars, L. (2012). New Headway: Pre intermediate workbook without key (4a ed.). Oxford.

Cita Chicago Style (17a ed.)

Soars, John, y Liz Soars. New Headway: Pre Intermediate Workbook Without Key. 4a ed. New York: Oxford, 2012.

Cita MLA (8a ed.)

Soars, John, y Liz Soars. New Headway: Pre Intermediate Workbook Without Key. 4a ed. Oxford, 2012.