Higgins, A. C. (1921). The psychology of nursing. G. P. Putnam's sons.
Lua i Stíl Chicago (17ú heag.)Higgins, Aileen Cleveland. The Psychology of Nursing. New York and London: G. P. Putnam's sons, 1921.
Lua MLA (8ú heag.)Higgins, Aileen Cleveland. The Psychology of Nursing. G. P. Putnam's sons, 1921.
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