Villanueva, M. A. (2008). Surveys don't win an election. IN Commonsense [column]. Philippine Star.
Chicago-referens (17:e uppl.)Villanueva, Marichu A. "Surveys Don't Win an Election. IN Commonsense [column]." Philippine Star 2008.
MLA-referens (9:e uppl.)Villanueva, Marichu A. "Surveys Don't Win an Election. IN Commonsense [column]." Philippine Star, 2008.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.