Audrey, S., Cooper, A. R., Hollingworth, W., Metcalfe, C., Procter, S., Davis, A., . . . Rodgers, S. E. (2015). Study protocol: The effectiveness and cost effectiveness of an employer-led intervention to increase walking during the daily commute: the Travel to Work randomised controlled trial. BMC Public Health.

Audrey, Suzanne, Ashley R. Cooper, William Hollingworth, Chris Metcalfe, Sunita Procter, Adrian Davis, Rona Campbell, Fiona Gillison, và Sarah E. Rodgers. "Study Protocol: The Effectiveness and Cost Effectiveness of an Employer-led Intervention to Increase Walking During the Daily Commute: The Travel to Work Randomised Controlled Trial." BMC Public Health 2015.

Audrey, Suzanne, et al. "Study Protocol: The Effectiveness and Cost Effectiveness of an Employer-led Intervention to Increase Walking During the Daily Commute: The Travel to Work Randomised Controlled Trial." BMC Public Health 2015.