Gaya APA

Ryeol, K, S., Patricia, . (2011). Why? origin of humankind and civilization = asal mula manusia dan peradaban . Jakarta: PT Elex Media Komputindo.

Gaya MLA

Ryeol, Kim, Seung., Patricia, . "Why? origin of humankind and civilization = asal mula manusia dan peradaban". Jakarta: PT Elex Media Komputindo, 2011. Text.