Tham khảo Bá_tước_xứ_Sandwich

  • Kidd, Charles; Williamson, David (1990). Debrett's Peerage and Baronetage. London and New York: St Martin's Press.
  • Mosley, Charles (2003). Burke's Peerage and Baronetage (ấn bản 107). ISBN 0-9711966-2-1.
  • Bản mẫu:Usurped

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