Philippines (Republic). National Economic Council. (1967). Economic survey of the province of Bulacan. [s.n.].
芝加哥风格引文Philippines (Republic). National Economic Council. Economic Survey of the Province of Bulacan. Manila: [s.n.], 1967.
MLA引文Philippines (Republic). National Economic Council. Economic Survey of the Province of Bulacan. [s.n.], 1967.
警告：这些引文格式不一定是100％准确.