Ingram, A. (1977). Index to the archives of Richard Bentley & Son, 1829-1898. Chadwyck-Healey ; Somerset House.
Lua i Stíl Chicago (17ú heag.)Ingram, Alison. Index to the Archives of Richard Bentley & Son, 1829-1898. Cambridge, Eng. : Teaneck, N.J.: Chadwyck-Healey ; Somerset House, 1977.
Lua MLA (8ú heag.)Ingram, Alison. Index to the Archives of Richard Bentley & Son, 1829-1898. Chadwyck-Healey ; Somerset House, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.