Gaya APA

Clesceri, L, S. et al (1998). Standard Methods for the Examination of Water and Wastewater; 20th edition (20). Baltimore, Maryland, USA: United Book Press, Inc. Baltimore, Maryland, USA.

Gaya MLA

Clesceri, Lenore, S.. et al. "Standard Methods for the Examination of Water and Wastewater; 20th edition". 20 Baltimore, Maryland, USA: United Book Press, Inc. Baltimore, Maryland, USA, 1998. Text.