Não informado. (1991). Qualitative Health Research. Sage Periodicals Press.
Chicago-referens (17:e uppl.)Não informado. Qualitative Health Research. Thousand Oaks, Calif: Sage Periodicals Press, 1991.
MLA-referens (8:e uppl.)Não informado. Qualitative Health Research. Sage Periodicals Press, 1991.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.