El-Hibir, B. I. (1976). Sources of common errors in the written English of Sudanese secondary school students. University of Wales.
Chicago Style (17th ed.) CitationEl-Hibir, Babiker Idris. Sources of Common Errors in the Written English of Sudanese Secondary School Students. Cardiff: University of Wales, 1976.
MLA引文El-Hibir, Babiker Idris. Sources of Common Errors in the Written English of Sudanese Secondary School Students. University of Wales, 1976.
警告：这些引文格式不一定是100％准确.