(en) Christopher Fifield, Ibbs and Tillett : The Rise and Fall of a Musical Empire, Burlington, Ashgate, , 678 p. (ISBN1840142901, OCLC54372133, lire en ligne)
(en) Christopher Fifield, Ibbs and Tillett : The Rise and Fall of a Musical Empire, Burlington, Ashgate, , 678 p. (ISBN1840142901, OCLC54372133, lire en ligne)