Stevens, B. J. (1979). Nursing theory: Analysis, application, evaluation. Little, Brown.
Lua i Stíl Chicago (17ú heag.)Stevens, Barbara J. Nursing Theory: Analysis, Application, Evaluation. Little, Brown, 1979.
Lua MLA (9ú heag.)Stevens, Barbara J. Nursing Theory: Analysis, Application, Evaluation. Little, Brown, 1979.
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