Philippines (Republic). National Electrification Administration. Total electrification for the Philippines. s.n.
Citazione stile Chigago Style (17a edizione)Philippines (Republic). National Electrification Administration. Total Electrification for the Philippines. [Quezon City: s.n.
Citatione MLA (9a ed.)Philippines (Republic). National Electrification Administration. Total Electrification for the Philippines. s.n.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.