Hoban, T. (1998). So many circles, so many squares. Greenwillow Books.
芝加哥风格引文Hoban, Tana. So Many Circles, so Many Squares. New York: Greenwillow Books, 1998.
MLA引文Hoban, Tana. So Many Circles, so Many Squares. Greenwillow Books, 1998.
警告：这些引文格式不一定是100％准确.