APA (7th ed.) Citation

Muhammad Umar. (2007). Kitar semula kertas. Pustaka prinsip sdn.bhd..

Chicago Style (17th ed.) Citation

Muhammad Umar. Kitar Semula Kertas. Kuala lumpur: Pustaka prinsip sdn.bhd., 2007.

MLA (9th ed.) Citation

Muhammad Umar. Kitar Semula Kertas. Pustaka prinsip sdn.bhd., 2007.

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