APA aipamena

Frei, A., Williams, K., Vetsch, A., Dobbels, F., Jacobs, L., Rüdell, K., & Puhan, M. A. (2011). A comprehensive systematic review of the development process of 104 patient-reported outcomes (PROs) for physical activity in chronically ill and elderly people. BioMed Central.

Chicago Style aipamena

Frei, Anja, Kate Williams, Anders Vetsch, Fabienne Dobbels, Laura Jacobs, Katja Rüdell, and Milo A. Puhan. A Comprehensive Systematic Review of the Development Process of 104 Patient-reported Outcomes (PROs) for Physical Activity in Chronically Ill and Elderly People. BioMed Central, 2011.

MLA aipamena

Frei, Anja, et al. A Comprehensive Systematic Review of the Development Process of 104 Patient-reported Outcomes (PROs) for Physical Activity in Chronically Ill and Elderly People. BioMed Central, 2011.