อ้างอิง

https://www.youtube.com/watch?v=VKHA1H4fD7U

http://pantip.com/topic/31099311

http://www.bloggang.com/viewdiary.php?id=sasiseesom&month=01-2014&date=10&group=12&gblog=44

http://pakiracanglamduan.blogspot.com/2009/08/1.html

http://suansanruk.blogspot.com/2011/06/blog-post_2363.html