ماخذ: Music Minus One - Ludwig Van Beethoven. String Quartets Op.18 No.1 In F And No.4 In C Minor. Sheet Music, CD. Violin. VLN.
ترجمه: موسیقی منهای یک - لودویگ وان بتهوون. The F major, though listed as No. 1, was the second composed. نت موسیقی، CD. ویولن.