Cita APA (7a ed.)
Soars, J., & Soars, L. (1991). Headway. English Course. Pre-Intermediate. Class Cassette 1. Oxford University Press.
Cita Chicago Style (17a ed.)
Soars, John, y Liz Soars. Headway. English Course. Pre-Intermediate. Class Cassette 1. Oxford: Oxford University Press, 1991.
Cita MLA (9a ed.)
Soars, John, y Liz Soars. Headway. English Course. Pre-Intermediate. Class Cassette 1. Oxford University Press, 1991.
Precaución: Estas citas no son 100% exactas.