APA (7th ed.) Citation

Hasan Hamzah, Maznah Awang, & Nor Faimah Abdul Karim. (1999). Alam semesta: Galaksi, cakerawala. Anzagain Sdn.Bhd..

Chicago Style (17th ed.) Citation

Hasan Hamzah, Maznah Awang, and Nor Faimah Abdul Karim. Alam Semesta: Galaksi, Cakerawala. Shah Alam: Anzagain Sdn.Bhd., 1999.

MLA (9th ed.) Citation

Hasan Hamzah, et al. Alam Semesta: Galaksi, Cakerawala. Anzagain Sdn.Bhd., 1999.