เทคโนโลยีการสื่อสารสมัยใหม่
https://nongam.wordpress.com/2012/08/17/%E0%B9%80%E0%B8%97%E0%B8%84%E0%B9%82%E0%B8%99%E0%B9%82%E0%B8%A5%E0%B8%A2%E0%B8%B5%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%AA%E0%B8%B7%E0%B9%88%E0%B8%AD%E0%B8%AA%E0%B8%B2%E0%B8%A3%E0%B8%AA%E0%B8%A1%E0%B8%B1/