PowerPoin คำควบกล้า
http://elsd.ssru.ac.th/arun_su/pluginfile.php/71/mod_page/content/1/%E0%B8%84%E0%B8%B3%E0%B8%84%E0%B8%A7%E0%B8%9A%E0%B8%81%E0%B8%A5%E0%B9%89%E0%B8%B3%E0%B9%81%E0%B8%97%E0%B9%89%20-%20.pdf