APA (7th ed.) Citation

McGowen, B., & Richardson, V. (2000). Clockwise: Pre-intermediate : classbook. Oxford University Press.

Chicago Style (17th ed.) Citation

McGowen, Bruce, and Vic Richardson. Clockwise: Pre-intermediate : Classbook. Oxford: Oxford University Press, 2000.

MLA (9th ed.) Citation

McGowen, Bruce, and Vic Richardson. Clockwise: Pre-intermediate : Classbook. Oxford University Press, 2000.