Weidig, A. (1899). Ballade: For violin and piano. Clayton F. Summy.
芝加哥风格引文Weidig, Adolf. Ballade: For Violin and Piano. Chicago: Clayton F. Summy, 1899.
MLA引文Weidig, Adolf. Ballade: For Violin and Piano. Clayton F. Summy, 1899.
警告：这些引文格式不一定是100％准确.