Gruen, G. (2007). Gypsy Music for C Instruments: A collection of tunes from Eastern Europe & the Balkans / by Gundula Gruen. Spartan Press Music Publ..
Chicago-viite (17. p.)Gruen, Gundula. Gypsy Music for C Instruments: A Collection of Tunes from Eastern Europe & the Balkans / by Gundula Gruen. Kingussie, Scotland: Spartan Press Music Publ., 2007.
MLA-viite (8. p.)Gruen, Gundula. Gypsy Music for C Instruments: A Collection of Tunes from Eastern Europe & the Balkans / by Gundula Gruen. Spartan Press Music Publ., 2007.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.