APA (7th ed.) Citation
Soars, J., & Soars, L. (1997). Headway. Pre-Intermediate. Workbook. With Key (14th impression.). Oxford University Press.
Chicago Style (17th ed.) Citation
Soars, John, and Liz Soars. Headway. Pre-Intermediate. Workbook. With Key. 14th impression. Oxford: Oxford University Press, 1997.
MLA (9th ed.) Citation
Soars, John, and Liz Soars. Headway. Pre-Intermediate. Workbook. With Key. 14th impression. Oxford University Press, 1997.
Warning: These citations may not always be 100% accurate.