Johnson, Betty M. <br/><br/>
An introduction to theory and reasoning in nursing / 
Betty M. Johnson, Pamela B. Webber. 
 - 3rd ed. 
 - Philadelphia :  Wolters Kluwer Health/Lippincott Williams & Wilkins,  c2010. 
 - xxi, 325 p. :  ill. ; Illustrations with indexes  23 cm.