American Public Health Association, American Water Works Association, Water Environment Federation, & Eaton, A. D. (2005). Standard methods for the examination of water and wastewater (21st ed.). American Public Health Association, American Water Works Association, Water Environment Federation.
Παραπομπή σε μορφή Chicago (17η εκδ.)American Public Health Association, American Water Works Association, Water Environment Federation, και Andrew D. Eaton. Standard Methods for the Examination of Water and Wastewater. 21st ed. Washington: American Public Health Association, American Water Works Association, Water Environment Federation, 2005.
Παραπομπή σε μορφή MLA (9th εκδ.)American Public Health Association, et al. Standard Methods for the Examination of Water and Wastewater. 21st ed. American Public Health Association, American Water Works Association, Water Environment Federation, 2005.