Economic bulletin - UP Labor Education Center. University of the Philippines Labor Education Center.
Citazione stile Chigago Style (17a edizione)Economic Bulletin - UP Labor Education Center. Manila: University of the Philippines Labor Education Center.
Citatione MLA (9a ed.)Economic Bulletin - UP Labor Education Center. University of the Philippines Labor Education Center.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.