Gaya APA

Hennessey, G, S. (-). Purple Learns to Use Less : Kura - kura Ungu Belajar Hemat (-). Jakarta: ILM.

Gaya MLA

Hennessey, Gail, Skroback. "Purple Learns to Use Less : Kura - kura Ungu Belajar Hemat". - Jakarta: ILM, -. Text.