APA (7th ed.) Citation

Sayer, M., Dellar, H., & Walkley, A. (2017). Advanced Outcomes: Teacher's Book. National Geographic Learning; Cengage Learning.

Chicago Style (17th ed.) Citation

Sayer, Mike, Hugh Dellar, and Andrew Walkley. Advanced Outcomes: Teacher's Book. United Kingdom: National Geographic Learning; Cengage Learning, 2017.

MLA (9th ed.) Citation

Sayer, Mike, et al. Advanced Outcomes: Teacher's Book. National Geographic Learning; Cengage Learning, 2017.