APA (7th ed.) Citation

Kim, Y. S., & Park, S. I. (2017). Why? MATEMATIK. Orbit Buku Sdn. Bhd.

Chicago Style (17th ed.) Citation

Kim, Yoo Soo, and Sung II Park. Why? MATEMATIK. Petaling Jaya, Selangor: Orbit Buku Sdn. Bhd, 2017.

MLA (9th ed.) Citation

Kim, Yoo Soo, and Sung II Park. Why? MATEMATIK. Orbit Buku Sdn. Bhd, 2017.