Berenstain, J., & Berenstain, M. (2007). Trim the tree. Harper Festival.
芝加哥风格引文Berenstain, Jan, 与 Mike Berenstain. Trim the Tree. New York: Harper Festival, 2007.
MLA引文Berenstain, Jan, 与 Mike Berenstain. Trim the Tree. Harper Festival, 2007.
警告：这些引文格式不一定是100％准确.