APA

Cunnngham S., Bowler B., . (1996). Headway. Intermediate. Oxford: Oxford University Press.

Chicago

Cunnngham S, Bowler B, . 1996. Headway. Intermediate. Oxford: Oxford University Press.

Harvard

Cunnngham S., Bowler B., . (1996). Headway. Intermediate. Oxford: Oxford University Press.

MLA

Cunnngham S, Bowler B, . Headway. Intermediate. Oxford: Oxford University Press. 1996.