Hapgood, I. F. (1915). The epic songs of Russia ([New ed.].). Constable.
芝加哥风格引文Hapgood, Isabel Florence. The Epic Songs of Russia. [New ed.]. Lond.: Constable, 1915.
MLA引文Hapgood, Isabel Florence. The Epic Songs of Russia. [New ed.]. Constable, 1915.
警告：这些引文格式不一定是100％准确.