APA (7th ed.) Citation

Tyndall B, Whalen T, Boeri M, & Ballard E. (2011). Drug use trajectory patterns among older drug users. Dove Medical Press.

Chicago Style (17th ed.) Citation

Tyndall B, Whalen T, Boeri M, and Ballard E. Drug Use Trajectory Patterns Among Older Drug Users. Dove Medical Press, 2011.

MLA (9th ed.) Citation

Tyndall B, et al. Drug Use Trajectory Patterns Among Older Drug Users. Dove Medical Press, 2011.