APA (7th ed.) Citation

Roberts, M., & Kaiser, S. (2013). Stretching. Alpha, a member of Penguin Group (USA) Inc.

Chicago Style (17th ed.) Citation

Roberts, Melanie, and Stephanie Kaiser. Stretching. New York, New York: Alpha, a member of Penguin Group (USA) Inc, 2013.

MLA (9th ed.) Citation

Roberts, Melanie, and Stephanie Kaiser. Stretching. Alpha, a member of Penguin Group (USA) Inc, 2013.