APA citiranje

(1994). Operation and maintenance of water supply and sanitaion systems: Case studies. Genava: World Health Organization (WHO).

Trích dẫn kiểu Chicago

Operation and Maintenance of Water Supply and Sanitaion Systems: Case Studies. Genava: World Health Organization (WHO), 1994.

MLA citiranje

Operation and Maintenance of Water Supply and Sanitaion Systems: Case Studies. Genava: World Health Organization (WHO), 1994.