APA aipamena

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

Chicago Style aipamena

McGowen, Bruce., và Vic Richardson. Clockwise: Pre - Intermediate : Classbook. New York: Oxford University Press, 2000.

MLA aipamena

McGowen, Bruce., và Vic Richardson. Clockwise: Pre - Intermediate : Classbook. New York: Oxford University Press, 2000.