[1] [CITE@ja[School Days - Wikipedia]]
([TIME[2010-04-24 08:57:08 +09:00]] 版)
<http://ja.wikipedia.org/wiki/School_Days>

[2] [CITE[無題ドキュメント]]
([TIME[2005-05-16 09:19:31 +09:00]] 版)
<http://www.za.ztv.ne.jp/eb92bdym/kouryaku/school/tyato>