APA-Zitierstil (7. Ausg.)

Hart, C., & Richardson, K. (2016). Keynote: Upper Intermediate. Teacher's Book (1a. ed.). National Geographic Learning.

Chicago-Zitierstil (17. Ausg.)

Hart, Claire, und Karen Richardson. Keynote: Upper Intermediate. Teacher's Book. 1a. ed. Hampshire: National Geographic Learning, 2016.

MLA-Zitierstil (9. Ausg.)

Hart, Claire, und Karen Richardson. Keynote: Upper Intermediate. Teacher's Book. 1a. ed. National Geographic Learning, 2016.