Cita APA

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

Chicago Edition Citation

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

Cita MLA

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