Tài liệu tham khảo WikiPedia: Calasiao //tools.wmflabs.org/geohack/geohack.php?language=v... http://www.calasiao.gov.ph/ http://www.census.gov.ph/data/pressrelease/2008/pr... http://www.nscb.gov.ph/activestats/psgc/default.as...
