Harding, K., & Wallwork, A. (2007). International express: Upper-intermediate .Student's Book. Oxford: Oxford Univ. Press.
Chicago-стиль цитированияHarding, Keith, và Adrian Wallwork. International Express: Upper-intermediate .Student's Book. Oxford: Oxford Univ. Press, 2007.
MLA-цитированиеHarding, Keith, và Adrian Wallwork. International Express: Upper-intermediate .Student's Book. Oxford: Oxford Univ. Press, 2007.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.