Wolfensberger, W. (1972). The principle of normalization in human services. National Institute on Mental Retardation.
Lua i Stíl Chicago (17ú heag.)Wolfensberger, Wolf. The Principle of Normalization in Human Services. Toronto: National Institute on Mental Retardation, 1972.
Lua MLA (9ú heag.)Wolfensberger, Wolf. The Principle of Normalization in Human Services. National Institute on Mental Retardation, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.