[1] File:Mon-Mon-Tue-Wed-Thu-Fri-Fri.JPG - Wikimedia Commons (2020-06-21 08:40:42 +09:00) https://commons.wikimedia.org/wiki/File:Mon-Mon-Tue-Wed-Thu-Fri-Fri.JPG
[2] 月月火水木金金 - Wikipedia (2020-06-20 19:26:03 +09:00) https://ja.wikipedia.org/wiki/%E6%9C%88%E6%9C%88%E7%81%AB%E6%B0%B4%E6%9C%A8%E9%87%91%E9%87%91
