Philippines (Republic). Bureau of Census and Statistics. Foreign trade statistics of the Philippines. s.n.
Cita Chicago (17th ed.)Philippines (Republic). Bureau of Census and Statistics. Foreign Trade Statistics of the Philippines. [S.l: s.n.
Cita MLA (9th ed.)Philippines (Republic). Bureau of Census and Statistics. Foreign Trade Statistics of the Philippines. s.n.
Atenció: Aquestes cites poden no estar 100% correctes.