อ้างอิง
http://www.thailabonline.com/mental-stress.htm
http://highwind.exteen.com/20080805/what-is-stress
http://www.swu.ac.th/royal/book6/b6c4t5.html
http://www.waluka.com/?name=knowledge&file=readknowledge&id=3
http://www.dhammathai.net/page/2/
http://www.pantown.com/board.php?id=376&area=1&name=board1&topic=117&action=view
http://www.watpon.com/test/serioustest.htm
http://www.siamhrm.com/?name=quiz&file=quiz_eq&quiz=5
http://www.dressingme.com/index.php?mo=3&art=447394
http://www.dmsc.moph.go.th/webroot/samutsongkhram/knowledge/s11/s11-4.htm
http://paidoo.net/article/4284436.html