James Haar, Anthony Newcomb, Massimo Ossi, Glenn Watkins, Nigel Fortune, Joseph Kerman, Jerome Roche: "Madrigal", Grove Music Online, ed. L. Macy (Accessed December 30, 2007), (subscription access)Arxivat 2008-05-16 a Wayback Machine.
James Haar, Anthony Newcomb, Massimo Ossi, Glenn Watkins, Nigel Fortune, Joseph Kerman, Jerome Roche: "Madrigal", Grove Music Online, ed. L. Macy (Accessed December 30, 2007), (subscription access)Arxivat 2008-05-16 a Wayback Machine.