Lewis, R. E. Aspects of polysemy in the "Middle English Dictionary": Robert E. Lewis. Historical dictionaries and historical dictionary research : papers from the International Conference on Historical Lexicography and Lexicology, at the University of Leicester, 2002.(2004).
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Lewis, Robert E. "Aspects of Polysemy in the "Middle English Dictionary": Robert E. Lewis." Historical Dictionaries and Historical Dictionary Research : Papers from the International Conference on Historical Lexicography and Lexicology, at the University of Leicester, 2002.(2004) .
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Lewis, Robert E. "Aspects of Polysemy in the "Middle English Dictionary": Robert E. Lewis." Historical Dictionaries and Historical Dictionary Research : Papers from the International Conference on Historical Lexicography and Lexicology, at the University of Leicester, 2002.(2004), .