Hill, T. E. (1901). Hill's manual of social and business forms: Twentieth century ed. A guide to correct writing ... Greatly enlarged and profusely illustrated, rev. and cor. to the latest dates. W. B. Conkey co.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hill, Thomas E. Hill's Manual of Social and Business Forms: Twentieth Century Ed. A Guide to Correct Writing ... Greatly Enlarged and Profusely Illustrated, Rev. and Cor. to the Latest Dates. Chicago: W. B. Conkey co, 1901.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hill, Thomas E. Hill's Manual of Social and Business Forms: Twentieth Century Ed. A Guide to Correct Writing ... Greatly Enlarged and Profusely Illustrated, Rev. and Cor. to the Latest Dates. W. B. Conkey co, 1901.
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