Gaya APA

Ritchie, A., Haas, C. (2008). It's time to sleep, you crazy sheep! = Waktunya tidur domba nakal . Jakarta: Erlangga For Kids.

Gaya MLA

Ritchie, Alison., Haas, Cornelia. "It's time to sleep, you crazy sheep! = Waktunya tidur domba nakal". Jakarta: Erlangga For Kids, 2008. Text.