Abdel-Wahab, A. R. (1972). Tax policy and problems in a developing economy: A case study of Sudan. s.n.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAbdel-Wahab, Abdel Rahman. Tax Policy and Problems in a Developing Economy: A Case Study of Sudan. Urbana, Ill: s.n, 1972.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAbdel-Wahab, Abdel Rahman. Tax Policy and Problems in a Developing Economy: A Case Study of Sudan. s.n, 1972.
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