Gaya APA
Tairas, M., J., Greenberg, A., E. (1971).
Standard Methods for The Examination of Water & Wastewater .
Geneva:
American Public Health Asociation.
Gaya MLA
Tairas, M., J., Greenberg, A., E..
Standard Methods for The Examination of Water & Wastewater.
Geneva:
American Public Health Asociation,
1971.
Lawas.