Johnson, Betty M., 
An introduction to theory and reasoning in nursing /  Betty M. Johnson, PhD, Pamela B. Webber, PhD, APRN, BC, FNP.   - Fourth edition.   - Philadelphia :  Wolters Kluwer/Lippincott Williams & Wilkins Health,  [2015]   - xxiii, 340 pages :  illustrations (black and white, and colour) ;  23 cm