Gaya APA

Greenberg, A, E. et al (1992). Standard Methods; 18th Edition 1992; For The Examination of Water and Wastewater (18). Baltimore, Maryland, USA: American Public Health Association, USA.

Gaya MLA

Greenberg, Arnold, E.. et al. "Standard Methods; 18th Edition 1992; For The Examination of Water and Wastewater". 18 Baltimore, Maryland, USA: American Public Health Association, USA, 1992. Text.