Pflegetheorie
Nightingale, Florence
http://www.a2z.org/nursing301/
Nursing theories
http://www.sandiego.edu/nursing/theory
Nursing Theory - Clayton
https://www.clayton.edu/health/Nursing/Nursing-Theory/
Clayton State University - Department of Nursing.
Orem, Dorothea
http://www.muhealth.org/~nursing/scdnt/scdnt.html
Parse, Rizzo
http://www.humanbecoming.org/
Peplau, Hildegard
http://publish.uwo.ca/~cforchuk/peplau/peplau.html
Wiedenbach, Ernestine
https://nursing-theory.org/nursing-theorists/Ernestine-Wiedenbach.php