Cita APA (7a ed.)
(1991). Are you listening? English language programs division.
Cita Chicago Style (17a ed.)
Are You Listening? Washington, D. C: English language programs division, 1991.
Cita MLA (9a ed.)
Are You Listening? English language programs division, 1991.
Precaución: Estas citas no son 100% exactas.