Gaya APA
Young-Sun, C., Lee, E. (2020).
Why? Dangerous Substance: Material Berbahaya .
Jakarta:
PT Elex Media Komputindo.
Gaya MLA
Young-Sun, Cho., Lee, Eunjung.
"Why? Dangerous Substance: Material Berbahaya".
Jakarta:
PT Elex Media Komputindo,
2020.
Text.