APA Style

Ritchie, A., Haas, C. (2008). It's Time to Sleep, You Crazy Sheep! = Waktunya Tidur, Domba Nakal! . Jakarta: Erlangga For Kids.

MLA Style

Ritchie, Alison., Haas, Cornelia. "It's Time to Sleep, You Crazy Sheep! = Waktunya Tidur, Domba Nakal!". Jakarta: Erlangga For Kids, 2008. Text.