Craddock, I. C. (1882). Primary phonography: An introduction to Isaac Pitman's system of phonetic shorthand; with a series of original exercises. The author.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Craddock, Ida C. Primary Phonography: An Introduction to Isaac Pitman's System of Phonetic Shorthand; with a Series of Original Exercises. Philadelphia: The author, 1882.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Craddock, Ida C. Primary Phonography: An Introduction to Isaac Pitman's System of Phonetic Shorthand; with a Series of Original Exercises. The author, 1882.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.