APA (7th ed.) Citation

Aishah Ahmad & Norsiati Shamsul Bahari. (2001). Praktis berfokus PMR: Sains. Preston Corporation Sdn.Bhd..

Chicago Style (17th ed.) Citation

Aishah Ahmad and Norsiati Shamsul Bahari. Praktis Berfokus PMR: Sains. Petaling Jaya: Preston Corporation Sdn.Bhd., 2001.

MLA (9th ed.) Citation

Aishah Ahmad and Norsiati Shamsul Bahari. Praktis Berfokus PMR: Sains. Preston Corporation Sdn.Bhd., 2001.

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