APA (7th ed.) Citation

Dwayne E. Porter, Karen A. Kirtland, Matthew J. Neet, Joel E. Williams, & Barbara E. Ainsworth. (2004). Considerations for Using a Geographic Information System to Assess Environmental Supports for Physical Activity. Centers for Disease Control and Prevention.

Chicago Style (17th ed.) Citation

Dwayne E. Porter, Karen A. Kirtland, Matthew J. Neet, Joel E. Williams, and Barbara E. Ainsworth. Considerations for Using a Geographic Information System to Assess Environmental Supports for Physical Activity. Centers for Disease Control and Prevention, 2004.

MLA (9th ed.) Citation

Dwayne E. Porter, et al. Considerations for Using a Geographic Information System to Assess Environmental Supports for Physical Activity. Centers for Disease Control and Prevention, 2004.