pei, m. (1981). The lexicon Webster dictionary: With a historical sketch of the English language. English-Language Institute of America.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)pei, mario. The Lexicon Webster Dictionary: With a Historical Sketch of the English Language. [Chicago]: English-Language Institute of America, 1981.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)pei, mario. The Lexicon Webster Dictionary: With a Historical Sketch of the English Language. English-Language Institute of America, 1981.