Gaya APA

}, A, E, G, {, E, A. (1981). Standard Methods for the Examination of Water and Wastewater 18th Edition 1992 (fifteenth edition). Washington DC: American Public Health Asociation.

Gaya MLA

}, Arnold, E, Greenberg, {, Et, Al. "Standard Methods for the Examination of Water and Wastewater 18th Edition 1992". fifteenth edition Washington DC: American Public Health Asociation, 1981. Text.