Παραπομπή APA

Ouano, E. (1983). Principles of Waste Water Treatment. National Science Development Board.

Παραπομπή Chicago Style

Ouano, E.A.R. Principles of Waste Water Treatment. Manila: National Science Development Board, 1983.

Παραπομπή MLA

Ouano, E.A.R. Principles of Waste Water Treatment. National Science Development Board, 1983.