APA (7th ed.) Citation

Dummet, P., Stephenson, H., & Lansford, L. (2016). Keynote: Intermediate. Student's Book (1a. ed.). National Geographic Learning.

Chicago Style (17th ed.) Citation

Dummet, Paul, Helen Stephenson, and Lewis Lansford. Keynote: Intermediate. Student's Book. 1a. ed. Hampshire: National Geographic Learning, 2016.

MLA (9th ed.) Citation

Dummet, Paul, et al. Keynote: Intermediate. Student's Book. 1a. ed. National Geographic Learning, 2016.