Philippines. Ministry of Information. (1981). Primer on the constitutional amendments. Ministry of Information.
芝加哥风格引文Philippines. Ministry of Information. Primer on the Constitutional Amendments. Manila: Ministry of Information, 1981.
MLA引文Philippines. Ministry of Information. Primer on the Constitutional Amendments. Ministry of Information, 1981.
警告：这些引文格式不一定是100％准确.