Philippines. National Tax Research Center. (1973). A Compilation of taxes, fees, charges and duties on selected Philippine export products. The Center.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Philippines. National Tax Research Center. A Compilation of Taxes, Fees, Charges and Duties on Selected Philippine Export Products. [Manila: The Center, 1973.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Philippines. National Tax Research Center. A Compilation of Taxes, Fees, Charges and Duties on Selected Philippine Export Products. The Center, 1973.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.