APA (7th ed.) Citation

Pettigrew, S., Jongenelis, M., Newton, R., Warburton, J., & Jackson, B. (2015). Research protocol for a randomized controlled trial of the health effects of volunteering for seniors. BioMed Central Ltd.

Chicago Style (17th ed.) Citation

Pettigrew, Simone, M. Jongenelis, R. Newton, J. Warburton, and B. Jackson. Research Protocol for a Randomized Controlled Trial of the Health Effects of Volunteering for Seniors. BioMed Central Ltd, 2015.

MLA (9th ed.) Citation

Pettigrew, Simone, et al. Research Protocol for a Randomized Controlled Trial of the Health Effects of Volunteering for Seniors. BioMed Central Ltd, 2015.