Sierra, J., & Sweet, M. (2009). The sleepy little alphabet: A bedtime story from Alphabet Town. Alfred A. Knopf.
芝加哥风格引文Sierra, Judy, 与 Melissa Sweet. The Sleepy Little Alphabet: A Bedtime Story from Alphabet Town. New York: Alfred A. Knopf, 2009.
MLA引文Sierra, Judy, 与 Melissa Sweet. The Sleepy Little Alphabet: A Bedtime Story from Alphabet Town. Alfred A. Knopf, 2009.
警告：这些引文格式不一定是100％准确.