Laura Ingalls Wilder. (1999). Sugar Snow (Little House Picture Book) (Revised ed.). HarperCollins.
芝加哥风格引文Laura Ingalls Wilder. Sugar Snow (Little House Picture Book). Revised ed. HarperCollins, 1999.
MLA引文Laura Ingalls Wilder. Sugar Snow (Little House Picture Book). Revised ed. HarperCollins, 1999.
警告：这些引文格式不一定是100％准确.