1. 2. Elinor V. Fuerst, and Luverne Wolff , Fundamentals of Nursing . Philadelphia: J. B. Lippincott, 1959 , p.37 .
2. 3. Ernestine Wiedenbach , Family Centered Maternity Nursing . New York: G. P. Putnam Sons, 1958 , p.223 .
3. 4. Phyllis Tryon , "An Experiment on the Effect of Patient Participation in Planning the Administration of a Nursing Procedure." Unpublished Master's Report, Yale School of Nursing, 1962 .