Burke, K., & Brooks, J. (2000). Wavelength: Pre-intermediate coursebook. Pearson Education.
Chicago Style (17. basım) AtıfBurke, Kathy, ve Julia Brooks. Wavelength: Pre-intermediate Coursebook. Essex: Pearson Education, 2000.
MLA (9th ed.) AtıfBurke, Kathy, ve Julia Brooks. Wavelength: Pre-intermediate Coursebook. Pearson Education, 2000.
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