@Book{sitereport_15315,
 author = "宮田 , 忠洋",
 title = "宍戸城跡",
 volume = "",
 publisher = "笠間市教育委員会",
 year = 2009,
 series = "笠間市文化財調査報告書",
 number = "",
 url = https://sitereports.nabunken.go.jp/15315,
 }