Soars, J., & Soars, L. (1991). Headway: Pre-Intermediate : Student's Book. Oxford: Oxford University Press.
Chicago-стиль цитированияSoars, John, và Liz Soars. Headway: Pre-Intermediate : Student's Book. Oxford: Oxford University Press, 1991.
MLA-цитированиеSoars, John, và Liz Soars. Headway: Pre-Intermediate : Student's Book. Oxford: Oxford University Press, 1991.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.