Παραπομπή σε μορφή APA (7η εκδ.)

Singapore. Public Utilities Board. (1980). Singapore's water supply. Public Utilities Board.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Singapore. Public Utilities Board. Singapore's Water Supply. Singapore: Public Utilities Board, 1980.

Παραπομπή σε μορφή MLA (8th εκδ.)

Singapore. Public Utilities Board. Singapore's Water Supply. Public Utilities Board, 1980.