Beekum, J. v. (1996). Sounds from Italy: I tre Tenori. For Band, mixed Choir or solo voice ad lib. / Arr. von Jan van Beekum. Molenaar Edition.
Chicago-referens (17:e uppl.)Beekum, Jan van. Sounds from Italy: I Tre Tenori. For Band, Mixed Choir or Solo Voice Ad Lib. / Arr. Von Jan Van Beekum. Wormerveer (NL): Molenaar Edition, 1996.
MLA-referens (8:e uppl.)Beekum, Jan van. Sounds from Italy: I Tre Tenori. For Band, Mixed Choir or Solo Voice Ad Lib. / Arr. Von Jan Van Beekum. Molenaar Edition, 1996.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.