Gaya APA

Youngsun, C. (2020). Why? survival science (Cet. 1). PT Elex Media Komputindo: Elex Media Komputindo.

Gaya MLA

Youngsun, Cho. "Why? survival science". Cet. 1 PT Elex Media Komputindo: Elex Media Komputindo, 2020. Text.