แหล่งอ้างอิง

http://thecprogrammingproject.weebly.com/

http://ookbeetunwalai.s3.amazonaws.com/cache/image.dek-d.com/27/0546/6646/121041763

https://sites.google.com/site/reuxnphunthinphakhklang/_/rsrc/1462348685708/home/6.png

https://sites.google.com/a/svc.ac.th/songkranday/_/rsrc/1444224167622/credits/phucadtha/img10.gif?height=133&width=400

http://images.slideplayer.in.th/8/2311475/slides/slide_7.jpg

http://cpe-programming.blogspot.com/2012/09/blog-post_30.html

https://www.youtube.com/watch?v=KkbQ2kqiV4c

https://www.youtube.com/watch?v=L6_E0UAmufw

https://www.youtube.com/watch?v=aM7eQMHLCQU

https://www.youtube.com/watch?v=_AOvS5MdqYM&index=2&list=PLpuOOb1LNswPrfGbihe4umjfmtAX8Ccwc

https://www.youtube.com/watch?v=B0vnXHkizC8&list=PLpuOOb1LNswPrfGbihe4umjfmtAX8Ccwc&index=5

https://www.youtube.com/user/Phonbopit
http://knowledgelanguagethai.myreadyweb.com/storage_upload/16/77603/uploads/images/%E0%B8%AD%E0%B9%89%E0%B8%B2%E0%B8%87%E0%B8%AD%E0%B8%B4%E0%B8%87.jpg
http://www.bloggang.com/data/auntymod/picture/1177226019.gif