Dyfyniad APA

Eaton( Andrew D.) et al. (2005). Standard methods for the examination of water and waste water (21.).

Dyfyniad Arddull Chicago

Eaton( Andrew D.) et al. Standard Methods for the Examination of Water and Waste Water. 21. American Public Health Association, 2005.

Dyfyniad MLA

Eaton( Andrew D.) et al. Standard Methods for the Examination of Water and Waste Water. 21. 2005.

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