>>5927002A few examples among many peer-reviewed articles that mention the four stages:
Conger, D. Stuart; Mullen, Dana (December 1981). "Life skills". International Journal for the Advancement of Counselling. 4 (4): 305–319. doi:10.1007/BF00118327. S2CID 189890482.
Engram, Barbara E. (October 1981). "Communication skills training for rehabilitation counselors working with older persons". Journal of Rehabilitation. 47 (4): 51–56. PMID 7321003.
Lipow, Anne Grodzins (Summer 1989). "Why training doesn't stick: who is to blame?". Library Trends. 38 (1): 62–72. hdl:2142/7651.
Beeler, Kent D. (Winter 1991). "Graduate student adjustment to academic life: a four-stage framework". NASPA Journal. 28 (2): 163–171. doi:10.1080/00220973.1991.11072201.
Underhill, Adrian (January 1992). "The role of groups in developing teacher self-awareness". ELT Journal. 46 (1): 71–80. doi:10.1093/elt/46.1.71.
Naidu, Som (January 1997). "Collaborative reflective practice: an instructional design architecture for the Internet". Distance Education. 18 (2): 257–283. doi:10.1080/0158791970180206.
Lee, Jiyeon; Gibson, Chere Campbell (September 2003). "Developing self-direction in an online course through computer-mediated interaction". American Journal of Distance Education. 17 (3): 173–187. doi:10.1207/S15389286AJDE1703_4. S2CID 62716687.
Goldfried, Marvin R. (March 2004). "Integrating integratively oriented brief psychotherapy". Journal of Psychotherapy Integration. 14 (1): 93–105. doi:10.1037/1053-0479.14.1.93.
Donati, Mark; Watts, Mary (November 2005). "Personal development in counsellor training: towards a clarification of inter-related concepts". British Journal of Guidance & Counselling. 33 (4): 475–484. doi:10.1080/03069880500327553. S2CID 144594377.
Lazanas, Panagiotis (January 2006). "A new integrated approach for the transfer of knowledge". South African Journal of Higher Education
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