1. Hurlock Elizabeth B: Personality Development: Tata McGraw Hill Publishing Company Ltd. New Delhi TMH Edition
2. Mander A.E.: Clearer Thinking; London Watts & Co., 5&6 Johnson’s court, Fleet Street
3. Covey Stephen R,: 7 Habits of Highly Effective People(2004), Simon& Schuster U.K. Ltd. 1st Floor, 222 Gray Inn Road, London