Cita APA (7a ed.)

(2005). Standard methods for the examination of water and wastewater (21st.). American Public Health Association.

Cita Chicago Style (17a ed.)

Standard Methods for the Examination of Water and Wastewater. 21st. Washington, D.C: American Public Health Association, 2005.

Cita MLA (9a ed.)

Standard Methods for the Examination of Water and Wastewater. 21st. American Public Health Association, 2005.