APA (7th ed.) Citation

Umar, M. (2008). Hindari Pencemaran Tanah. Jurus Prinsip Sdn. Bhd..

Chicago Style (17th ed.) Citation

Umar, Muhammad. Hindari Pencemaran Tanah. Kuala Lumpur: Jurus Prinsip Sdn. Bhd., 2008.

MLA (9th ed.) Citation

Umar, Muhammad. Hindari Pencemaran Tanah. Jurus Prinsip Sdn. Bhd., 2008.

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