Industrial Development Center. (1962). Report on the economic survey of Romblon, November 1962. Industrial Development Center.
Chicago-referens (17:e uppl.)Industrial Development Center. Report on the Economic Survey of Romblon, November 1962. Manila: Industrial Development Center, 1962.
MLA-referens (9:e uppl.)Industrial Development Center. Report on the Economic Survey of Romblon, November 1962. Industrial Development Center, 1962.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.