อ้างอิง

อ้างอิง

• ·     http://www.school.net.th/library/create web/10000/science/10000-3100.html
• ·         http://butterflytukta.wordpress.com/2011/08/21/%E0%B8%9C%E0%B8%B5%E0%B9%80%E0%B8%AA%E0%B8%B7%E0%B9%89%E0%B8%AD%E0%B8%81%E0%B8%A5%E0%B8%B2%E0%B8%87%E0%B8%A7%E0%B8%B1%E0%B8%99-%E0%B8%9C%E0%B8%B5%E0%B9%80%E0%B8%AA%E0%B8%B7%E0%B9%89%E0%B8%AD%E0%B8%81/
• ·         http://guru.sanook.com/encyclopedia/%E0%B8%9C%E0%B8%B5%E0%B9%80%E0%B8%AA%E0%B8%B7%E0%B9%89%E0%B8%AD%E0%B9%83%E0%B8%99%E0%B8%A7%E0%B8%87%E0%B8%A8%E0%B9%8C%E0%B8%95%E0%B9%88%E0%B8%B2%E0%B8%87%E0%B9%86%E0%B8%82%E0%B8%AD%E0%B8%87%E0%B8%9B%E0%B8%A3%E0%B8%B0%E0%B9%80%E0%B8%97%E0%B8%A8%E0%B9%84%E0%B8%97%E0%B8%A2/
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• ·     http://202.143.150.150/4910414/nighttime.html