Lundy, M. (2001). Quadrivium: The four classical liberal arts of number, geometry, music, & cosmology (NA.). Wooden Books.
Chicago-referens (17:e uppl.)Lundy, Miranda. Quadrivium: The Four Classical Liberal Arts of Number, Geometry, Music, & Cosmology. NA. New York: Wooden Books, 2001.
MLA-referens (9:e uppl.)Lundy, Miranda. Quadrivium: The Four Classical Liberal Arts of Number, Geometry, Music, & Cosmology. NA. Wooden Books, 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.