(2000). Vigan: An electronic document on Vigan : the past, present and future. Office of the Mayor.
Chicago-referens (17:e uppl.)Vigan: An Electronic Document on Vigan : The Past, Present and Future. Vigan: Office of the Mayor, 2000.
MLA-referens (9:e uppl.)Vigan: An Electronic Document on Vigan : The Past, Present and Future. Office of the Mayor, 2000.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.