แหล่งอ้างอิง

http://hilight.kapook.com/view/92088

http://th.wikipedia.org/wiki/%E0%B8%AA%E0%B8%87%E0%B8%84%E0%B8%A3%E0%B8%B2%E0%B8%A1%E0%B9%80%E0%B8%A2%E0%B9%87%E0%B8%99

https://www.google.co.th/search?q=coolwar&source=lnms&tbm=isch&sa=X&ei=VZ7oUqCiAa2kigeo8IGoBQ&ved=0CAcQ_AUoAQ&biw=1280&bih=933#q=%E0%B8%AB%E0%B8%A5%E0%B8%B1%E0%B8%87%E0%B8%AA%E0%B8%87%E0%B8%84%E0%B8%A3%E0%B8%B2%E0%B8%A1%E0%B9%80%E0%B8%A2%E0%B9%87%E0%B8%99&tbm=isch&imgdii=_