Lansford, L., Dummett, P., & Stephenson, H. (2016). Keynote: Advanced. Student's Book (1a. ed.). National Geographic Learning.
Chicago Style (17. basım) AtıfLansford, Lewis, Paul Dummett, ve Helen Stephenson. Keynote: Advanced. Student's Book. 1a. ed. Hampshire: National Geographic Learning, 2016.
MLA (9th ed.) AtıfLansford, Lewis, et al. Keynote: Advanced. Student's Book. 1a. ed. National Geographic Learning, 2016.
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