American Public Health Association (APHA), American Water Works Association (AWWA), Water environment Federation (WEF), Baird, R. B., Eaton, A. D., & Rice, E. W. (2017). Standard methods for the examination of water & wastewater (23 edition.). Washington, Estados Unidos de América: APHA.

American Public Health Association (APHA), American Water Works Association (AWWA), Water environment Federation (WEF), Rodger B. Baird, Andrew D. Eaton, and Eugene W. Rice. Standard Methods for the Examination of Water & Wastewater. 23 edition. Washington, Estados Unidos de América: APHA, 2017.

American Public Health Association (APHA), et al. Standard Methods for the Examination of Water & Wastewater. 23 edition. Washington, Estados Unidos de América: APHA, 2017.