Gaya APA

Greenberg, A, E. (1985). Standar Methods For The Examination of Water and Wastewater (16th.ed). Washington: American Public Health Association.

Gaya MLA

Greenberg, Arnold, E.et.al. "Standar Methods For The Examination of Water and Wastewater". 16th.ed Washington: American Public Health Association, 1985. Text.