APA (7 वां संस्करण) प्रशस्ति पत्र

Zafar, A. (2005). Revenue and the fiscal impact of trade liberalization: The case of Niger. World Bank.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Zafar, Ali. Revenue and the Fiscal Impact of Trade Liberalization: The Case of Niger. Washington, D.C: World Bank, 2005.

एमएलए (9वां संस्करण) प्रशस्ति पत्र

Zafar, Ali. Revenue and the Fiscal Impact of Trade Liberalization: The Case of Niger. World Bank, 2005.