Harrison, D. L. (1978). The circus is in town: A counting book. Western publishing.
芝加哥风格引文Harrison, David L. The Circus Is in Town: A Counting Book. New York: Western publishing, 1978.
MLA引文Harrison, David L. The Circus Is in Town: A Counting Book. Western publishing, 1978.
警告：这些引文格式不一定是100％准确.