APA (7th ed.) Citation

Weeks, M., Convey, M., Dickson-Gomez, J., Li, J., Radda, K., Martinez, M., & Robles, E. (2009). Changing drug users' risk environments: Peer health advocates as multi-level Community Change Agents.

Chicago Style (17th ed.) Citation

Weeks, M., M. Convey, J. Dickson-Gomez, Jianghong Li, K. Radda, M. Martinez, and E. Robles. Changing Drug Users' Risk Environments: Peer Health Advocates as Multi-level Community Change Agents. 2009.

MLA (9th ed.) Citation

Weeks, M., et al. Changing Drug Users' Risk Environments: Peer Health Advocates as Multi-level Community Change Agents. 2009.