Eaton, A. D. (2005). Standard methods for the examination of water and wastewater/21st ed. American public health association American water works association.

Eaton, Andrew D. Standard Methods for the Examination of Water and Wastewater/21st Ed. U S A: American public health association American water works association, 2005.

Eaton, Andrew D. Standard Methods for the Examination of Water and Wastewater/21st Ed. American public health association American water works association, 2005.