Boyer, S. L., Edmondson, D. R., Artis, A. B., & Fleming, D.,(2014), Self-directed learning: A tool for lifelong learning, Journal of Marketing Education, 36(1), 20-32
 Brockett, R. G., & Hiemstra, R., (1991), Self-direction in adult learning: Perspectives on theory, research and practice: Routledge.
 Candy, P. C., (1991), Self-Direction for Lifelong Learning. A Comprehensive Guide to Theory and Practice. Jossey-Bass, 350 Sansome Street, San Francisco, CA 94104-1310.: ERIC.
 Elias, J. L., & Merriam, S. B., (1995), Philosophical foundations of adult education: ERIC.
 Grow, G. O., (1991), Teaching learners to be selfdirected. Adult education quarterly, 41(3), 125-149.
 Kawalilak, C., & Groen, J., (2014), Pathways of adult learning: Professional and education narratives: Canadian Scholars’ Press.
 Loeng, S., (2020), Self-Directed Learning: A Core Concept in Adult Education. Education Research International, 2020.
 Loyens, S. M., Magda, J., & Rikers, R. M., (2008), Selfdirected learning in problem-based learning and its relationships with self-regulated learning. Educational Psychology Review, 20(4), 411-427
 Morris, T. H. , (2019), Adaptivity through self-directed learning to meet the challenges of our ever-changing world. Adult Learning, 30(2), 56-66
 Song, L., & Hill, J. R., (2007), A conceptual model for understanding self-directed learning in online environments, Journal of Interactive Online Learning, 6(1), 27-42.
 Tan, C., (2017), A Confucian perspective of selfcultivation in learning: Its implications for self-directed learning, Journal of Adult and Continuing Education, 23(2), 250-262
 Tough, A., (1971), The Adult’s Learning Projects. A Fresh Approach to Theory and Practice in Adult Learning. Toronto: Ontario Institute for Studies in Education.