ماخذ: Progressive Keyboard Method 2. Book and CD. Sheet Music, CD. Keyboard. KBD. Introduces seven new chords and another 40 songs.
ترجمه: پیشرو روش صفحه کلید 2. کتاب و CD. نت موسیقی، CD. صفحه کلید. Also contains minor scales, swing rhythms, and syncopation.
