APA (7th ed.) Citation

Dellar, H., & Walkley, A. (2016). Outcomes: Intermediate Student's Book (second edition.). National Geographic Learning; Cengage Learning.

Chicago Style (17th ed.) Citation

Dellar, Hugh, and Andrew Walkley. Outcomes: Intermediate Student's Book. second edition. United Kingdom: National Geographic Learning; Cengage Learning, 2016.

MLA (9th ed.) Citation

Dellar, Hugh, and Andrew Walkley. Outcomes: Intermediate Student's Book. second edition. National Geographic Learning; Cengage Learning, 2016.