Krenek, E. (1985). Eight Pieces for Two Guitars: Transcribed by Theodore Norman. California Guitar Archives.
Chicago-referens (17:e uppl.)Krenek, Ernst. Eight Pieces for Two Guitars: Transcribed by Theodore Norman. Palos Verdes Peninsula, CA: California Guitar Archives, 1985.
MLA-referens (8:e uppl.)Krenek, Ernst. Eight Pieces for Two Guitars: Transcribed by Theodore Norman. California Guitar Archives, 1985.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.