Gaya APA

Youngsun, C., Novianti, E, N. (2020). Why? Dangerous Substance - Material Berbahaya (Cet. 1). Jakarta: PT. Gramedia Pustaka Utama.

Gaya MLA

Youngsun, Cho., Novianti, Endah, Nawang. "Why? Dangerous Substance - Material Berbahaya". Cet. 1 Jakarta: PT. Gramedia Pustaka Utama, 2020. Art Original.