Concept mapping for planning and evaluation / Mary Kane and William M.K. Trochim.
Cultural diversity in health and illness / Rachel E. Spector. 7th ed.
International encyclopedia of the social & behavioral sciences / editors in chief Neil J. Smelser, Paul B. Baltes.
Introduction to qualitative research methods : a guidebook and resource / Steven J. Taylor, Robert Bogdan, Marjorie L. DeVault. 4th edition.
Medical and psychosocial aspects of chronic illness and disability / Donna R. Falvo. 5th ed.
Systematic reviews in the social sciences : a practical guide / Mark Petticrew and Helen Roberts.