ماخذ: Gordon Jacob. Gordon Jacob. Six Little Tuba Pieces. Sheet Music. Tuba, Piano Accompaniment. TBA. PFA.
ترجمه: گوردون یعقوب. شش کوچک طوبا قطعات. نت موسیقی. گوردون یعقوب. She had rightly complained that, having made the effort and achieved her Grade 5.