Cita APA (7th ed.)

Cunningham, S., & Bowler, B. (1999). New headway pronunciation: Intermediate student's practice book. Oxford University Press.

Cita Chicago (17th ed.)

Cunningham, Sarah, i Bill Bowler. New Headway Pronunciation: Intermediate Student's Practice Book. Oxford: Oxford University Press, 1999.

Cita MLA (9th ed.)

Cunningham, Sarah, i Bill Bowler. New Headway Pronunciation: Intermediate Student's Practice Book. Oxford University Press, 1999.