Musick, W. L. (1899). The universal dictation course of Gregg's shorthand: Made up of business letters from twenty-six different businesses, together with legal papers, depositions, and testimony from civil and criminal cases. W.L. Musick.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Musick, William Leslie. The Universal Dictation Course of Gregg's Shorthand: Made Up of Business Letters from Twenty-six Different Businesses, Together with Legal Papers, Depositions, and Testimony from Civil and Criminal Cases. St. Louis: W.L. Musick, 1899.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Musick, William Leslie. The Universal Dictation Course of Gregg's Shorthand: Made Up of Business Letters from Twenty-six Different Businesses, Together with Legal Papers, Depositions, and Testimony from Civil and Criminal Cases. W.L. Musick, 1899.