(1988). 1988 PCCI trade & industry directory. The Philippine Chamber of Commerce and Industry.
Citazione stile Chigago Style (17a edizione)1988 PCCI Trade & Industry Directory. s.l: The Philippine Chamber of Commerce and Industry, 1988.
Citatione MLA (9a ed.)1988 PCCI Trade & Industry Directory. The Philippine Chamber of Commerce and Industry, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.