Carter, Walter (1996). Eiche, Jon (ed.). The history of the Ovation guitar. Musical Instruments Series (first ed.). Milwaukee, Wisconsin: Hal Leonard Corporation. pp. 1–128. ISBN978-0-7935-5876-6. HL00330187.
Carter, Walter (1996). Eiche, Jon (ed.). The history of the Ovation guitar. Musical Instruments Series (first ed.). Milwaukee, Wisconsin: Hal Leonard Corporation. pp. 1–128. ISBN978-0-7935-5876-6. HL00330187.