Cita APA

Soars, J., Soars, L., & Wheeldon, S. (2007). New headway: Pre - Intermediate : Workbook with key (3rd ed.). Oxford: Oxford Univ. Press.

Citación estilo Chicago

Soars, John, Liz Soars, y Sylvia Wheeldon. New Headway: Pre - Intermediate : Workbook With Key. 3rd ed. Oxford: Oxford Univ. Press, 2007.

Cita MLA

Soars, John, Liz Soars, y Sylvia Wheeldon. New Headway: Pre - Intermediate : Workbook With Key. 3rd ed. Oxford: Oxford Univ. Press, 2007.