แหล่งอ้างอิง
1. http://dbsql.sura.ac.th/know/ramkum/establis.htm
2. http://writer.dek-d.com/Writer/story/viewlongc.php?id=252449&chapter=5
4. http://www.sd.ac.th/websd2550/Programs/Social_Program/NewVersion/4-sukhothai.html
5. http://olddreamz.com/inscript/sukhothai1.html
6. http://www.moohin.com/thaihistory/h012c010.shtml
7. http://poobpab.com/content/tripoom/tripoom.htm
8. http://www.moohin.com/thaihistory/h012c012.shtml
9. http://www.moohin.com/thaihistory/h012c013.shtml
11. http://www.lks.ac.th/kukiat/student/betterroyal/social/12.html
13. http://recmert.kku.ac.th/webboard/viewtopic.php?t=275
14. http://contacshop.tripod.com/ceramic.htm
15. http://dbsql.sura.ac.th/know/ramkum/economic.htm
16. http://www.oknation.net/blog/print.php?id=264797
17. http://krunoi-anchalee.blogspot.com/2007/09/blog-post_9979.html
18. http://guru.google.co.th/guru/thread?tid=6e1ca29f82f9f4f4
19. http://www.pantown.com/board.php?id=3455&area=&name=board3&topic=3&action=view
20. http://www.siamfreestyle.com/forum/index.php?showtopic=269
21. http://www.siamfreestyle.com/forum/index.php?showtopic=268
22. http://www.siamfreestyle.com/forum/index.php?showtopic=273
23. http://www.siamfreestyle.com/forum/index.php?showtopic=272
24. http://www.siamfreestyle.com/forum/index.php?showtopic=274