Παραπομπή APA

Sayer, M., & Dellar, H. (2019). Outcomes: Upper Intermediate - Teacher's Book. United Kingdom: National Geographic Learning.

Παραπομπή Chicago Style

Sayer, Mike, και Hugh Dellar. Outcomes: Upper Intermediate - Teacher's Book. United Kingdom: National Geographic Learning, 2019.

Παραπομπή MLA

Sayer, Mike, και Hugh Dellar. Outcomes: Upper Intermediate - Teacher's Book. United Kingdom: National Geographic Learning, 2019.

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