1. Lifelong learning: concepts and conceptions;Aspin;International Journal of Lifelong Education,2000
2. Lifelong Learning in the 21st Century and Beyond;Collins;Journal of RadioGraphics,2009
3. The value of lifelong learning: key element in professional career development;Duyff;Journal of Am Diet Assoc.,1999
4. Cross, K.P. (1981). Adults as Learners: Increasing Participation and Facilitating Learning (1st Ed). San Francisco, USA, Jossey-Bass publishing.
5. Lifelong education;Field;International Journal of Lifelong Education,2001