Cita APA (7th ed.)

Cunnngham S. Sarah & Bowler B. Bill. (1996). Headway. Intermediate. Oxford, Oxford University Press, 1996.

Cita Chicago (17th ed.)

Cunnngham S. Sarah i Bowler B. Bill. Headway. Intermediate. Oxford, Oxford University Press, 1996, 1996.

Cita MLA (9th ed.)

Cunnngham S. Sarah i Bowler B. Bill. Headway. Intermediate. Oxford, Oxford University Press, 1996, 1996.