- E-VAT on oil = http://www.gmanews.tv/largevideo/latest/25491/-Saksi--Govt-told-Remove-VAT-raise-'sin-taxes'
- Proposed specific tax = http://www.congress.gov.ph/press/details.php?pressid=2430
- Specific tax vs. Ad valorem tax = http://www.britannica.com/EBchecked/topic/558755/specific-tax#tab=active~checked%2Citems~checked&title=specific%20tax%20--%20Britannica%20Online%20Encyclopedia