Soars, J., & Soars, L. (2002). American headway starter: Student book. New York: Oxford University Press.
Trích dẫn kiểu ChicagoSoars, John, và Liz Soars. American Headway Starter: Student Book. New York: Oxford University Press, 2002.
Deismireacht MLASoars, John, và Liz Soars. American Headway Starter: Student Book. New York: Oxford University Press, 2002.
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