Sistem suria dan alam semesta | Chow Choo Khean | Dewan Kosmik | 1 December 1995 |
Sistem suria dan alam semesta | Chow Choo Khean | Dewan Kosmik | 1 February 1996 |
Sistem suria dan alam semesta | Chow Choo Khean | Dewan Kosmik | 1 January 1996 |
Sistem undang-undang di Malaysia [oleh Ahmad Ibrahim dan Ahilemah Joned] | Suria Janib | Dewan Masyarakat | 1 October 2007 |