Soars, J., & Soars, L. (1987). Headway upper - intermediate: Teacher's book. New York: Oxford University Press.
استشهاد بنمط شيكاغوSoars, John, و Liz Soars. Headway Upper - Intermediate: Teacher's Book. New York: Oxford University Press, 1987.
MLA استشهادSoars, John, و Liz Soars. Headway Upper - Intermediate: Teacher's Book. New York: Oxford University Press, 1987.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.