Richard, J.A. (1979). "The Pleyel Harpsichord"(PDF). The British Harpsichord Society. Archived from the original(PDF) on 13 November 2008. Retrieved 13 April 2009.
Richard, J.A. (1979). "The Pleyel Harpsichord"(PDF). The British Harpsichord Society. Archived from the original(PDF) on 13 November 2008. Retrieved 13 April 2009.