de Dios, L. (1996). Impediments to trade in the Philippines. Philippine Institute for Development Studies.
Citazione stile Chigago Style (17a edizione)de Dios, Loreli. Impediments to Trade in the Philippines. [Makati City]: Philippine Institute for Development Studies, 1996.
Citatione MLA (9a ed.)de Dios, Loreli. Impediments to Trade in the Philippines. Philippine Institute for Development Studies, 1996.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.