Philippines. Ministry of Information. (1981). Primer on the constitutional amendments. Ministry of Information.
Citazione stile Chigago Style (17a edizione)Philippines. Ministry of Information. Primer on the Constitutional Amendments. Manila: Ministry of Information, 1981.
Citatione MLA (9a ed.)Philippines. Ministry of Information. Primer on the Constitutional Amendments. Ministry of Information, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.