Barber, D., & Richardson, K. (2016). Keynote: Intermediate. Teacher's Book (1a. ed.). National Geographic Learning.
Chicagoスタイル(17版)引用形式Barber, Daniel, , Karen Richardson. Keynote: Intermediate. Teacher's Book. 1a. ed. Hampshire: National Geographic Learning, 2016.
MLA(9版)引用形式Barber, Daniel, , Karen Richardson. Keynote: Intermediate. Teacher's Book. 1a. ed. National Geographic Learning, 2016.
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