Philippines (Republic). National Economic Council. (1967). Economic survey of the province of Bulacan. [s.n.].
Citazione stile Chigago Style (17a edizione)Philippines (Republic). National Economic Council. Economic Survey of the Province of Bulacan. Manila: [s.n.], 1967.
Citatione MLA (9a ed.)Philippines (Republic). National Economic Council. Economic Survey of the Province of Bulacan. [s.n.], 1967.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.