Dyfyniad APA

American Public Health Association, A. W. W. A. (1999). Standard Methods for the Examination of Water and Wastewater. US.

Dyfyniad Arddull Chicago

American Public Health Association, American Water Works Association. Standard Methods for the Examination of Water and Wastewater. US, 1999.

Dyfyniad MLA

American Public Health Association, American Water Works Association. Standard Methods for the Examination of Water and Wastewater. US, 1999.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.