APA (7th ed.) Citation

Cotterill, S., Howells, K., Rhodes, S., & Bower, P. (2017). The effect of using social pressure in cover letters to improve retention in a longitudinal health study: An embedded randomised controlled retention trial. Trials, 18, 1. https://doi.org/10.1186/s13063-017-2090-5

Chicago Style (17th ed.) Citation

Cotterill, Sarah, Kelly Howells, Sarah Rhodes, and Peter Bower. "The Effect of Using Social Pressure in Cover Letters to Improve Retention in a Longitudinal Health Study: An Embedded Randomised Controlled Retention Trial." Trials 18 (2017): 1. https://doi.org/10.1186/s13063-017-2090-5.

MLA (9th ed.) Citation

Cotterill, Sarah, et al. "The Effect of Using Social Pressure in Cover Letters to Improve Retention in a Longitudinal Health Study: An Embedded Randomised Controlled Retention Trial." Trials, vol. 18, 2017, p. 1, https://doi.org/10.1186/s13063-017-2090-5.