Izvornik: Harmony Lessons, Book 1. AP.EL00373A. John W. Schaum. Piano Method sheet music. Piano Solo sheet music. Harmony Lessons, Book 1.
Prijevod: Harmony lekcije, Book 1. Klavir Metoda note. Piano Solo note. Harmony lekcije, Book 1. Napomena Speller 3. Skladao John W. Schaum. Za Piano.