สืบค้น : การศึกษาตามอัธยาศัย

https://th.wikipedia.org/wiki/%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%A8%E0%B8%B6%E0%B8%81%E0%B8%A9%E0%B8%B2%E0%B8%95%E0%B8%B2%E0%B8%A1%E0%B8%AD%E0%B8%B1%E0%B8%98%E0%B8%A2%E0%B8%B2%E0%B8%A8%E0%B8%B1%E0%B8%A2
http://education.dusit.ac.th/edu_doc/news/new250110.html
https://sites.google.com/site/somchaythongyaem/kar-cadkar-suksa-tam-xathyasay
http://amnat.nfe.go.th/koratsite2.05/UserFiles/File/ytg.pdf
http://mediathailand.blogspot.com/2012/05/blog-post_460.html