Izvornik: Technic Tricks, Book 1. Most piano technic books begin at the grade-two-level, or at an even more advanced stage. John W. Schaum.
Prijevod: Technic trikovi, knjiga 1. Klavir Metoda note. Piano Solo note. Technic trikovi, knjiga 1 skladao John W. Schaum. Za Piano. Način. Nastava.