Philippines & Pinpin, F. (1978). The tariff and customs code of the Philippines: Revised and codified as amended by P.D. no. 34, other presidential decrees and executive orders as of year-end 1977 with implementing regulations (5th ed.). Cacho Hermanos.
Chicago-referens (17:e uppl.)Philippines och F.D Pinpin. The Tariff and Customs Code of the Philippines: Revised and Codified as Amended by P.D. No. 34, Other Presidential Decrees and Executive Orders as of Year-end 1977 with Implementing Regulations. 5th ed. Mandaluyong, Metro Manila: Cacho Hermanos, 1978.
MLA-referens (9:e uppl.)Philippines och F.D Pinpin. The Tariff and Customs Code of the Philippines: Revised and Codified as Amended by P.D. No. 34, Other Presidential Decrees and Executive Orders as of Year-end 1977 with Implementing Regulations. 5th ed. Cacho Hermanos, 1978.