@Book{sitereport_11713,
 author = "安田, 忠市",
 title = "久保田城跡",
 volume = "平成９年度",
 publisher = "秋田市教育委員会",
 year = 1997,
 series = "",
 number = "",
 url = https://sitereports.nabunken.go.jp/11713,
 }