(1960). Trombone and Baritone Method. Bd. 1: Charles Petrie. Belwin-Mills.
Cita Chicago (17th ed.)Trombone and Baritone Method. Bd. 1: Charles Petrie. Melville, NY: Belwin-Mills, 1960.
Cita MLA (8th ed.)Trombone and Baritone Method. Bd. 1: Charles Petrie. Belwin-Mills, 1960.
Atenció: Aquestes cites poden no estar 100% correctes.