Gaya APA

Greenberg, A., F. et al. (1995). Standard Methods for the examination of water and wastewater (19 nd ed). New York: Aemerican Public Health Association.

Gaya MLA

Greenberg, A., F. et al.. Standard Methods for the examination of water and wastewater. 19 nd ed New York: Aemerican Public Health Association, 1995. Text.