Sayer, M., Dellar, H., & Walkley, A. (2017). Outcomes. Advanced: Teacher's book class audio. National Geographic Learning Cengage Learning.
Citace podle Chicago (17th ed.)Sayer, Mike, Hugh Dellar, a Andrew Walkley. Outcomes. Advanced: Teacher's Book Class Audio. United Kingdom: National Geographic Learning Cengage Learning, 2017.
Citace podle MLA (9th ed.)Sayer, Mike, et al. Outcomes. Advanced: Teacher's Book Class Audio. National Geographic Learning Cengage Learning, 2017.
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