Dyfyniad APA

OMS. (1994). Operation and maintenance of urban water supply and sanitation systems: A guide for managers. Geneva: OMS.

Dyfyniad Arddull Chicago

OMS. Operation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide for Managers. Geneva: OMS, 1994.

Dyfyniad MLA

OMS. Operation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide for Managers. Geneva: OMS, 1994.

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