APA (7th ed.) Citation

Kripke, D. F., Kline, L. E., & Langer, R. D. Hypnotics' association with mortality or cancer: A matched cohort study. BMJ Publishing Group.

Chicago Style (17th ed.) Citation

Kripke, Daniel F., Lawrence E. Kline, and Robert D. Langer. Hypnotics' Association with Mortality or Cancer: A Matched Cohort Study. BMJ Publishing Group.

MLA (9th ed.) Citation

Kripke, Daniel F., et al. Hypnotics' Association with Mortality or Cancer: A Matched Cohort Study. BMJ Publishing Group.