Mayer, M., Dyer, J., & Krauss, R. (2007). Little Critter: I Am Helping (1st board book ed.). HarperFestival.
芝加哥风格引文Mayer, Mercer, Jane Dyer, 与 Ruth Krauss. Little Critter: I Am Helping. 1st board book ed. New York: HarperFestival, 2007.
MLA引文Mayer, Mercer, et al. Little Critter: I Am Helping. 1st board book ed. HarperFestival, 2007.
警告：这些引文格式不一定是100％准确.