American Telephone and Telegraph Company. (1923). The application of electricity and magnetism to transmission in the telephone plant. American Telephone and Telegraph Company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)American Telephone and Telegraph Company. The Application of Electricity and Magnetism to Transmission in the Telephone Plant. Dallas: American Telephone and Telegraph Company, 1923.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)American Telephone and Telegraph Company. The Application of Electricity and Magnetism to Transmission in the Telephone Plant. American Telephone and Telegraph Company, 1923.
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