Cita APA

Bowler, B., & Cunningham, S. (1994). Headway: Upper- Intermediate Pronunciation. Thanh Hóa: Thanh Hóa.

Chicago Style Citation

Bowler, Bill, i Sarah Cunningham. Headway: Upper- Intermediate Pronunciation. Thanh Hóa: Thanh Hóa, 1994.

Cita MLA

Bowler, Bill, i Sarah Cunningham. Headway: Upper- Intermediate Pronunciation. Thanh Hóa: Thanh Hóa, 1994.

Atenció: Aquestes cites poden no estar 100% correctes.