APA (7th ed.) Citation

Dellar, H., & Walkley, A. (2010). Outcomes Intermediate: Class Audio CD. Heinle Cengage Learning.

Chicago Style (17th ed.) Citation

Dellar, Hugh, and Andrew Walkley. Outcomes Intermediate: Class Audio CD. [Hampshire]: Heinle Cengage Learning, 2010.

MLA (9th ed.) Citation

Dellar, Hugh, and Andrew Walkley. Outcomes Intermediate: Class Audio CD. Heinle Cengage Learning, 2010.