APA (7th ed.) Citation

Campbell Malcolm, Todd Chris, & Lavelle Katrina. (2008). Do postage stamps versus pre-paid envelopes increase responses to patient mail surveys? A randomised controlled trial. BMC.

Chicago Style (17th ed.) Citation

Campbell Malcolm, Todd Chris, and Lavelle Katrina. Do Postage Stamps Versus Pre-paid Envelopes Increase Responses to Patient Mail Surveys? A Randomised Controlled Trial. BMC, 2008.

MLA (9th ed.) Citation

Campbell Malcolm, et al. Do Postage Stamps Versus Pre-paid Envelopes Increase Responses to Patient Mail Surveys? A Randomised Controlled Trial. BMC, 2008.