Chanco, B. (2001). Telecoms clearning house not needed. IN Demand and supply [column]. Philippine Star.
Citazione stile Chigago Style (17a edizione)Chanco, Boo. "Telecoms Clearning House Not Needed. IN Demand and Supply [column]." Philippine Star 2001.
Citatione MLA (9a ed.)Chanco, Boo. "Telecoms Clearning House Not Needed. IN Demand and Supply [column]." Philippine Star, 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.