1. Ansari and Kaur (2007), Medical Surgical Nursing, (1sted.) Jalandhar, Vikasand company Medical publishers. (780 – 787)
2. Basavanthappa, B. (2007) B, Nursing Research, (2nded.) New Delhi, Jaypeebrothers’ medical publishers. (442 – 475)
3. Barbara K. Timby et.al (2007), Introductory Medical Surgical Nursing, (9thed.) Philadelphia, Lippincott Williams and Wilkins. (470 – 477)
4. Brunner and Suddarth’s (2008), Medical Surgical Nursing. (11thed) London, Lippincott Publications. (713 - 715)
5. Christensen Kockrow (2011), Foundations and Adult Health Nursing, (6thed.) Missouri, Mosby publications. (1556 – 1563)