Cita APA (7a ed.)
Soars, L., & Soars, J. American Headway: Student Book 3. Oxford University.
Cita estilo Chicago (17a ed.)
Soars, Liz, y John Soars. American Headway: Student Book 3. Nueva York, EUA: Oxford University.
Cita MLA (9a ed.)
Soars, Liz, y John Soars. American Headway: Student Book 3. Oxford University.
Precaución: Estas citas no son 100% exactas.