APA (7th ed.) Citation

SURTAHMAN Kastin Hasan & Abd. Ghafar Ismail. (1997). Alam sekitar: Permasalahan dan pengawalan. DBP.

Chicago Style (17th ed.) Citation

SURTAHMAN Kastin Hasan and Abd. Ghafar Ismail. Alam Sekitar: Permasalahan Dan Pengawalan. Kuala Lumpur: DBP, 1997.

MLA (9th ed.) Citation

SURTAHMAN Kastin Hasan and Abd. Ghafar Ismail. Alam Sekitar: Permasalahan Dan Pengawalan. DBP, 1997.

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