O.G. Sonneck, quoted in Philip Hale, "The birth-date of Gottlieb Graupner", Boston Symphony Orchestra Programme for 29th season, 1909-1910 (Boston: The Orchestra, 1910) p.920ff, Internet Archive
Oscar George Theodore Sonneck, Early Concert-Life in America (1731-1800) (Leipzig: Breitkopf & Härtel, 1907), 306 Internet Archive
Rudiments of the Art of Playing on the Piano Forte: containing elements of music, preliminary remarks on fingering with examples, thirty fingered lessons, and a plain direction for tuning. Arranged by Gottlieb Graupner, described at Via Libri: Graupner, GottliebArchived 2012-05-12 at the Wayback Machine, accessed November 4, 2011
web.archive.org
Rudiments of the Art of Playing on the Piano Forte: containing elements of music, preliminary remarks on fingering with examples, thirty fingered lessons, and a plain direction for tuning. Arranged by Gottlieb Graupner, described at Via Libri: Graupner, GottliebArchived 2012-05-12 at the Wayback Machine, accessed November 4, 2011