Παραπομπή σε μορφή APA (7η εκδ.)

(1993). The maintenance of infrastructure and its financing and cost recovery. United Nations Centre for Human Settlement.

Παραπομπή σε μορφή Chicago (17η εκδ.)

The Maintenance of Infrastructure and Its Financing and Cost Recovery. Nairobi: United Nations Centre for Human Settlement, 1993.

Παραπομπή σε μορφή MLA (9th εκδ.)

The Maintenance of Infrastructure and Its Financing and Cost Recovery. United Nations Centre for Human Settlement, 1993.