Philippine Islands. Bureau of Navigation. (1975). List of rivers of the Philippine Islands with information as ti location, navigability, shelter afforded and adjacent population. Comp. by the Division of Port Works, Bureau of Navigation [microform]. Photoduplication Service.
Chicago-viite (17. p.)Philippine Islands. Bureau of Navigation. List of Rivers of the Philippine Islands with Information as Ti Location, Navigability, Shelter Afforded and Adjacent Population. Comp. by the Division of Port Works, Bureau of Navigation [microform]. Quezon City: Photoduplication Service, 1975.
MLA-viite (9. p.)Philippine Islands. Bureau of Navigation. List of Rivers of the Philippine Islands with Information as Ti Location, Navigability, Shelter Afforded and Adjacent Population. Comp. by the Division of Port Works, Bureau of Navigation [microform]. Photoduplication Service, 1975.