APA (7th ed.) Citation

Williamson, P., Gamble, C., Altman, D., & Hutton, J. (2005). Outcome selection bias in meta-analysis.

Chicago Style (17th ed.) Citation

Williamson, P., C. Gamble, D. Altman, and J. Hutton. Outcome Selection Bias in Meta-analysis. 2005.

MLA (9th ed.) Citation

Williamson, P., et al. Outcome Selection Bias in Meta-analysis. 2005.