ماخذ: Piano Mastery. Talks with Paderewski, Hofmann and Others. Piano Solo sheet music. Piano Mastery. Edited by Jeffrey Johnson.
ترجمه: تسلط پیانو. Talks with Paderewski, Hofmann and Others composed by Harriette Brower. نت پیانو. تسلط پیانو. برای پیانو. شاهکارهای.