Gaya APA

Hawking, L. et al (2012). George's cosmic treasure hunt : George berburu harta karun (edisi 1). Jakarta: Gramedia Pustaka Utama.

Gaya MLA

Hawking, Lucy. et al. "George's cosmic treasure hunt : George berburu harta karun". edisi 1 Jakarta: Gramedia Pustaka Utama, 2012. Text.