Soars, J., & Soars, L. (1993). Headway intermediate student's book & pre-intermediate workbook. Oxford: Oxford University Press.
استشهاد بنمط شيكاغوSoars, John, و Liz Soars. Headway Intermediate Student's Book & Pre-intermediate Workbook. Oxford: Oxford University Press, 1993.
MLA استشهادSoars, John, و Liz Soars. Headway Intermediate Student's Book & Pre-intermediate Workbook. Oxford: Oxford University Press, 1993.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.