Cita APA (7th ed.)

American Public Health Association, American Water Works Association, & Water Environment Federation. (2017). Standard methods for the examination of water and wastewater (23rd edition.). American Public Health Association.

Cita Chicago (17th ed.)

American Public Health Association, American Water Works Association, i Water Environment Federation. Standard Methods for the Examination of Water and Wastewater. 23rd edition. Washington, D.C: American Public Health Association, 2017.

Cita MLA (9th ed.)

American Public Health Association, et al. Standard Methods for the Examination of Water and Wastewater. 23rd edition. American Public Health Association, 2017.