Philippines. National Tax Research Center. (1973). A Compilation of taxes, fees, charges and duties on selected Philippine export products. The Center.
Chicago-viite (17. p.)Philippines. National Tax Research Center. A Compilation of Taxes, Fees, Charges and Duties on Selected Philippine Export Products. [Manila: The Center, 1973.
MLA-viite (9. p.)Philippines. National Tax Research Center. A Compilation of Taxes, Fees, Charges and Duties on Selected Philippine Export Products. The Center, 1973.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.