Citação norma APA

(1994). Operation and Maintenance of Urban Water Supply and Sanitation Systems A guide for Managers. World Health Organization.

Citação norma Chicago

Operation and Maintenance of Urban Water Supply and Sanitation Systems A Guide for Managers. Ginebra: World Health Organization, 1994.

Citação norma MLA

Operation and Maintenance of Urban Water Supply and Sanitation Systems A Guide for Managers. World Health Organization, 1994.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.