Gaya APA

Lucy, ., Hawking, S. (2007). George's Scret Key To The Universe (Ed. 1). Jakarta: PT. Gramedia Pustaka Utama.

Gaya MLA

Lucy, ., Hawking, Stephen. "George's Scret Key To The Universe". Ed. 1 Jakarta: PT. Gramedia Pustaka Utama, 2007. Text.