比利小子
參考文獻與腳注

↑  Nolan, Frederick. . University of Oklahoma Press. 2015: 29  [July 1, 2019]. ISBN 978-0-8061-4887-8. （原始内容存档于September 2, 2021）.
1 2  Utley 1989，第15頁.
↑   Letter from Rev. James B. Roberts, Church of St. Peter, New York City, to Jack DeMattos, March 24, 1979.
↑  DeMattos 1980.
↑  Nolan 2009，第1–6頁. sfn模板錯誤: 多個指向目標 (2個): CITEREFNolan2009 (幫助)
↑  Rasch & Mullin 1953，第1–5頁.
↑  Rasch 1954，第6–11頁.
↑  Nolan 1998，第15, 29頁.
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