APA (7th ed.) Citation

Hasan Hamzah. (1997). Apa & mengapa: Sains (5). Piramid perdana (m) sdn.bhd..

Chicago Style (17th ed.) Citation

Hasan Hamzah. Apa & Mengapa: Sains (5). Selangor: Piramid perdana (m) sdn.bhd., 1997.

MLA (9th ed.) Citation

Hasan Hamzah. Apa & Mengapa: Sains (5). Piramid perdana (m) sdn.bhd., 1997.

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