Horn, E., & Ashbaugh, E. J. (1928). The Horn-Ashbaugh high school speller: Incorporating the findings of a tabular analysis of 5,100,000 words of ordinary writing and of over 1,000,000 running words of letters written by high school students. J.B. Lippincott Co.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Horn, Ernest, و Ernest J. Ashbaugh. The Horn-Ashbaugh High School Speller: Incorporating the Findings of a Tabular Analysis of 5,100,000 Words of Ordinary Writing and of over 1,000,000 Running Words of Letters Written by High School Students. Philadelphia [etc.]: J.B. Lippincott Co, 1928.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Horn, Ernest, و Ernest J. Ashbaugh. The Horn-Ashbaugh High School Speller: Incorporating the Findings of a Tabular Analysis of 5,100,000 Words of Ordinary Writing and of over 1,000,000 Running Words of Letters Written by High School Students. J.B. Lippincott Co, 1928.