George, J. B. (2002). Nursing theories: The base for professional nursing practice (5th ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)George, Julia B. Nursing Theories: The Base for Professional Nursing Practice. 5th ed. Upper Saddle River, NJ: Prentice Hall, 2002.
Lua MLA (9ú heag.)George, Julia B. Nursing Theories: The Base for Professional Nursing Practice. 5th ed. Prentice Hall, 2002.
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