อ้างอิง

1. https://sites.google.com/site/phaykiltaw/home

2. https://www.thaihealth.or.th/Content/47546-%E0%B8%AD%E0%B8%B1%E0%B8%99%E0%B8%95%E0%B8%A3%E0%B8%B2%E0%B8%A2%E0%B8%88%E0%B8%B2%E0%B8%81%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.html