APA (7th ed.) Citation

Supriyadi, D. (2013). Why ? Chemistry Kimia. PT. Elex Media Komputerindo.

Chicago Style (17th ed.) Citation

Supriyadi, Deni. Why ? Chemistry Kimia. PT. Elex Media Komputerindo, 2013.

MLA (8th ed.) Citation

Supriyadi, Deni. Why ? Chemistry Kimia. PT. Elex Media Komputerindo, 2013.

Warning: These citations may not always be 100% accurate.