APA (7th ed.) Citation

Roberts, J. D., Voss, J. D., & Knight, B. (2014). The association of ambient air pollution and physical inactivity in the United States. Public Library of Science (PLoS).

Chicago Style (17th ed.) Citation

Roberts, Jennifer D., Jameson D. Voss, and Brandon Knight. The Association of Ambient Air Pollution and Physical Inactivity in the United States. Public Library of Science (PLoS), 2014.

MLA (8th ed.) Citation

Roberts, Jennifer D., et al. The Association of Ambient Air Pollution and Physical Inactivity in the United States. Public Library of Science (PLoS), 2014.