APA (7th ed.) Citation

ZAINI Ujang. (1997). Pengenalan pencemaran udara. DBP.

Chicago Style (17th ed.) Citation

ZAINI Ujang. Pengenalan Pencemaran Udara. Kuala Lumpur: DBP, 1997.

MLA (9th ed.) Citation

ZAINI Ujang. Pengenalan Pencemaran Udara. DBP, 1997.

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