APA (7th ed.) Citation

Marcus, B., & Forsyth, L. (2003). Motivating people to be physically active / Bess H. Marcus, LeighAnn H. Forsyth. Human Kinetics.

Chicago Style (17th ed.) Citation

Marcus, Bess, and LeighAnn Forsyth. Motivating People to Be Physically Active / Bess H. Marcus, LeighAnn H. Forsyth. Champaign, Ill. ; Leeds: Human Kinetics, 2003.

MLA (9th ed.) Citation

Marcus, Bess, and LeighAnn Forsyth. Motivating People to Be Physically Active / Bess H. Marcus, LeighAnn H. Forsyth. Human Kinetics, 2003.

Warning: These citations may not always be 100% accurate.