APA (7th ed.) Citation

Lenton, S., Kerry, K., Tan-Quigley, A., & Greig, R. (2000). Citizens who inject drugs: The 'Fitpack' study.

Chicago Style (17th ed.) Citation

Lenton, Simon, K. Kerry, A. Tan-Quigley, and R. Greig. Citizens Who Inject Drugs: The 'Fitpack' Study. 2000.

MLA (9th ed.) Citation

Lenton, Simon, et al. Citizens Who Inject Drugs: The 'Fitpack' Study. 2000.