APA (7th ed.) Citation

Heo, S. B., & Noor Shahariza Nordin. (2017). Why? Penyakit. Orbit Buku Sdn. Bhd..

Chicago Style (17th ed.) Citation

Heo, Su Bong, and Noor Shahariza Nordin. Why? Penyakit. Petaling Jaya: Orbit Buku Sdn. Bhd., 2017.

MLA (9th ed.) Citation

Heo, Su Bong, and Noor Shahariza Nordin. Why? Penyakit. Orbit Buku Sdn. Bhd., 2017.

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