Gaya APA

Greenberg, A, E. et al (2005). Standard Methods For The Examination Of Water And Wastewater (18). Washingto: American Public Health Associatio.

Gaya MLA

Greenberg, Arnold, E.. et al. "Standard Methods For The Examination Of Water And Wastewater". 18 Washingto: American Public Health Associatio, 2005. Text.