De Vera, B. O. 2 firms ok'd for fuel marking system bid. IN Business. Philippine Daily Inquirer.
Citazione stile Chigago Style (17a edizione)De Vera, Ben O. "2 Firms Ok'd for Fuel Marking System Bid. IN Business." Philippine Daily Inquirer .
Citatione MLA (9a ed.)De Vera, Ben O. "2 Firms Ok'd for Fuel Marking System Bid. IN Business." Philippine Daily Inquirer, .
Attenzione: Queste citazioni potrebbero non essere precise al 100%.