APA citiranje

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

Trích dẫn kiểu Chicago

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

MLA citiranje

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