APA (7 वां संस्करण) प्रशस्ति पत्र

Philippines. (1988). Tariff and customs code of the Philippines: Harmonized commodity description and coding system. Philippine Tariff Commission.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Philippines. Tariff and Customs Code of the Philippines: Harmonized Commodity Description and Coding System. Quezon City: Philippine Tariff Commission, 1988.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Philippines. Tariff and Customs Code of the Philippines: Harmonized Commodity Description and Coding System. Philippine Tariff Commission, 1988.

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