อ้างอิง

อ้างอิง

http://wiki.stjohn.ac.th/groups/poly_energyandenvironment1/wiki/432c9/_7_.html     12-06-2557
http://www.ostc.thaiembdc.org/stnews_July11_5.html   12-06-2557
https://sites.google.com/site/61project1827/wikvt-phlangngan-laea-phawa-lok-rxn     13-06-2557
https://sites.google.com/site/joilzibm12/bth-thi-3-ssar-laea-phlangngan-thi-keiywkhxng-kab-chiwit-mnusy/wikvtkarn-phlangngan-laea-kar-pxngkan-kaekhi-payha-wikvtkarn-phlangngan  13-06-2557
http://wisanusimalai.blogspot.com/   13-06-2557