Soars, L., & Soars, L. (2009). American Headway 3: The world's most trusted English course. Workbook (2a. ed.). Oxford University Press.
Citace podle Chicago (17th ed.)Soars, Liz, a Liz Soars. American Headway 3: The World's Most Trusted English Course. Workbook. 2a. ed. Nueva York: Oxford University Press, 2009.
Citace podle MLA (9th ed.)Soars, Liz, a Liz Soars. American Headway 3: The World's Most Trusted English Course. Workbook. 2a. ed. Oxford University Press, 2009.
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