Soars, J., & Soars, L. (1987). Headway upper-intermediate workbook. Oxford: Oxford University Press.
Chicago Style CitationSoars, John, and Liz Soars. Headway Upper-intermediate Workbook. Oxford: Oxford University Press, 1987.
MLA CitationSoars, John, and Liz Soars. Headway Upper-intermediate Workbook. Oxford: Oxford University Press, 1987.
Warning: These citations may not always be 100% accurate.