Henkes, K., & Yaccarino, D. (1998). Circle dogs. Greenwillow Books.
芝加哥风格引文Henkes, Kevin, 与 Dan Yaccarino. Circle Dogs. New York: Greenwillow Books, 1998.
MLA引文Henkes, Kevin, 与 Dan Yaccarino. Circle Dogs. Greenwillow Books, 1998.
警告：这些引文格式不一定是100％准确.