Bicol River Basin Development Program. (1976). Comprehensive development plan: 1975-2000. The Office.
Chicago-referens (17:e uppl.)Bicol River Basin Development Program. Comprehensive Development Plan: 1975-2000. Baras, Canaman, Camarines Sur: The Office, 1976.
MLA-referens (9:e uppl.)Bicol River Basin Development Program. Comprehensive Development Plan: 1975-2000. The Office, 1976.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.