Soars, J., & Soars, L. (1993). Headway intermediate student's book & pre-intermediate workbook. Oxford: Oxford University Press.
Trích dẫn kiểu ChicagoSoars, John, và Liz Soars. Headway Intermediate Student's Book & Pre-intermediate Workbook. Oxford: Oxford University Press, 1993.
MLA引文Soars, John, và Liz Soars. Headway Intermediate Student's Book & Pre-intermediate Workbook. Oxford: Oxford University Press, 1993.
警告：這些引文格式不一定是100％准確.