Bicol River Basic Council. (1975). Project feasibility study of Libmanan: Cabusao integrated development. The Council.
Chicago-referens (17:e uppl.)Bicol River Basic Council. Project Feasibility Study of Libmanan: Cabusao Integrated Development. Camarines Sur: The Council, 1975.
MLA-referens (9:e uppl.)Bicol River Basic Council. Project Feasibility Study of Libmanan: Cabusao Integrated Development. The Council, 1975.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.