Hoppers, Wim (1 May 2000). "Nonformal Education, Distance Education and the Restructuring of Schooling: Challenges for a New Basic Education Policy". International Review of Education. 46 (1): 5–30. doi:10.1023/A:1003910005160. ISSN1573-0638. S2CID142779608.
Rogers, Alan (3 September 2019). "Second-generation non-formal education and the sustainable development goals: operationalising the SDGs through community learning centres". International Journal of Lifelong Education. 38 (5): 515–526. doi:10.1080/02601370.2019.1636893. ISSN0260-1370. S2CID199154922.
[McGivney, V. (1999) Informal learning in the community: a trigger for change and development (Leicester: NIACE). Cited in 'Helen Colley, Phil Hodkinson & Janice Malcolm (2002) Non-formal learning: mapping the conceptual terrain. A Consultation Report, Leeds: University of Leeds Lifelong Learning Institute. Also available in the informal education archives: http://www.infed.org/archives/e-texts/colley_informal_learning.htm]
Scribner, S.; Cole, M. (November 1973). "Cognitive Consequences of Formal and Informal Education". Science. 182 (4112): 553–559. doi:10.1126/science.182.4112.553. PMID17739714.
nordvux.net
[ Feutrie M. (2007), Validation of Non-formal and Informal Learning in Europe: Comparative Approaches, Challenges and Possibilities, communication at the conference on .Recognition of Prior Learning: Nordic-Baltic Experiences and European Perspectives., Copenhagen, 8 March 07 http://www.nordvux.net/page/489/keynotesandpresentations.htmArchived 13 March 2012 at the Wayback Machine]
Hoppers, Wim (1 May 2000). "Nonformal Education, Distance Education and the Restructuring of Schooling: Challenges for a New Basic Education Policy". International Review of Education. 46 (1): 5–30. doi:10.1023/A:1003910005160. ISSN1573-0638. S2CID142779608.
Rogers, Alan (3 September 2019). "Second-generation non-formal education and the sustainable development goals: operationalising the SDGs through community learning centres". International Journal of Lifelong Education. 38 (5): 515–526. doi:10.1080/02601370.2019.1636893. ISSN0260-1370. S2CID199154922.
ssrn.com
papers.ssrn.com
Willems, Jurgen; Andersson, Fredrik O. (22 September 2022). "Learning New Learning: Maturing the Public Governance of Non-formal Education". SSRN4227081.
[ Feutrie M. (2007), Validation of Non-formal and Informal Learning in Europe: Comparative Approaches, Challenges and Possibilities, communication at the conference on .Recognition of Prior Learning: Nordic-Baltic Experiences and European Perspectives., Copenhagen, 8 March 07 http://www.nordvux.net/page/489/keynotesandpresentations.htmArchived 13 March 2012 at the Wayback Machine]
Hoppers, Wim (1 May 2000). "Nonformal Education, Distance Education and the Restructuring of Schooling: Challenges for a New Basic Education Policy". International Review of Education. 46 (1): 5–30. doi:10.1023/A:1003910005160. ISSN1573-0638. S2CID142779608.
Rogers, Alan (3 September 2019). "Second-generation non-formal education and the sustainable development goals: operationalising the SDGs through community learning centres". International Journal of Lifelong Education. 38 (5): 515–526. doi:10.1080/02601370.2019.1636893. ISSN0260-1370. S2CID199154922.