Gaya APA

Ritchie, A. (2008). Waktunya tidur, domba nakal ! = it's time to sleep, you crazy sheep! (Cet. 1). JAKARTA: Erlangga For Kids.

Gaya MLA

Ritchie, Alison. "Waktunya tidur, domba nakal ! = it's time to sleep, you crazy sheep!". Cet. 1 JAKARTA: Erlangga For Kids, 2008. Text.