McDougal, Littell and Company. (1987). McDougal, Littell literature. McDougal, Littell and Company.
芝加哥风格引文McDougal, Littell and Company. McDougal, Littell Literature. Evanston, Ill.: McDougal, Littell and Company, 1987.
MLA引文McDougal, Littell and Company. McDougal, Littell Literature. McDougal, Littell and Company, 1987.
警告：这些引文格式不一定是100％准确.