Cita APA

Cunningham, S., & Sarah Cunningham; Bill Bowler. (1999). New Headway Pronunciation Course: Intermediate. Oxford: Oxford University Press.

Citación estilo Chicago

Cunningham, Sarah, y Sarah Cunningham; Bill Bowler. New Headway Pronunciation Course: Intermediate. Oxford: Oxford University Press, 1999.

Cita MLA

Cunningham, Sarah, y Sarah Cunningham; Bill Bowler. New Headway Pronunciation Course: Intermediate. Oxford: Oxford University Press, 1999.