APA aipamena

Elfeky, A., Gillies, K., Gardner, H., Fraser, C., Ishaku, T., & Treweek, S. (2020). Non-randomised evaluations of strategies to increase participant retention in randomised controlled trials: A systematic review. Syst Rev.

Chicago Style aipamena

Elfeky, Adel, Katie Gillies, Heidi Gardner, Cynthia Fraser, Timothy Ishaku, and Shaun Treweek. "Non-randomised Evaluations of Strategies to Increase Participant Retention in Randomised Controlled Trials: A Systematic Review." Syst Rev 2020.

MLA aipamena

Elfeky, Adel, et al. "Non-randomised Evaluations of Strategies to Increase Participant Retention in Randomised Controlled Trials: A Systematic Review." Syst Rev 2020.