Não informado. (1991). Qualitative Health Research. Sage Periodicals Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Qualitative Health Research. Thousand Oaks, Calif: Sage Periodicals Press, 1991.
Lua MLA (8ú heag.)Não informado. Qualitative Health Research. Sage Periodicals Press, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.