Johns, E., & Pfefferkorn, B. (1954). The Johns Hopkins School of Nursing, 1889-1949. Johns Hopkins Press.
Lua i Stíl Chicago (17ú heag.)Johns, Ethel, agus Blanche Pfefferkorn. The Johns Hopkins School of Nursing, 1889-1949. Baltimore: Johns Hopkins Press, 1954.
Lua MLA (8ú heag.)Johns, Ethel, agus Blanche Pfefferkorn. The Johns Hopkins School of Nursing, 1889-1949. Johns Hopkins Press, 1954.
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