Hast, Adele (1992). International Directory of Company Histories. Detroit: St. James Press. стр. 328. ISBN1-55862-061-3. „Southwestern Bell Telephone Company has about 20 predecessor companies. The four largest of these were American District Telegraph Company, formed in St. Louis, Missouri 1878; the Kansas City Telephone Exchange, formed in Kansas City, Missouri in 1879, Southwestern Telegraph & Telephone Company, which began serving Texas and Arkansas in 1881; and Pioneer Telephone & Telegraph Company, which provided telephone service beginning in 1904 in Oklahoma – not then a state, but known as Indian Territory – and in parts of Kansas.”
Hast, Adele (1992). International Directory of Company Histories. Detroit: St. James Press. стр. 328. ISBN1-55862-061-3. „In 1917, the four companies began moving toward a more formal merge, with the Missouri & Kansas Telephone Company – the new name of the Kansas City Telephone Exchange – acquiring Bell Telephone Company of Missouri, successor to American District Telegraph. The resulting company was named Southwestern Bell Telephone Company (Missouri). In 1920 this company bought Southwestern Telephone & Telegraph and Southwestern Bell Telephone Company (Oklahoma), the successor to Pioneer Telephone & Telegraph, establishing the new Southwestern Bell Telephone Company, which was a subsidiary of AT&T.”
Blumenthal, Eli (6. 8. 2020). „T-Mobile leapfrogs AT&T, saying it's 2nd largest US carrier after Sprint merger”. CNET. Приступљено 1. 8. 2022. „It’s been a busy year for T-Mobile, but the carrier continues to see subscriber growth and says it has now moved past AT&T to become the nation's second-largest wireless carrier despite the coronavirus pandemic... Combining the additional postpaid subscribers with the addition of Sprint's customer base gives T-Mobile a total of 98.3 million subscribers, which it says pushes it past AT&T when it comes to total postpaid and prepaid users, though the company is still behind Verizon.”CS1 одржавање: Формат датума (веза)
AT&T Inc. (14. 3. 2003). Form 10-K ANNUAL REPORT - 2002 (Извештај). стр. 155. Приступљено 22. 3. 2021. „2002 Operating Revenues - $43,138 (dollars in millions”
AT&T Inc. (14. 3. 2003). Form 10-K ANNUAL REPORT - 2006 (Извештај). стр. 312. Приступљено 22. 3. 2021. „2005 Net Income - $4,786 (dollars in millions”
AT&T Inc. (24. 2. 2012). Form 10-K ANNUAL REPORT - 2011 (Извештај). стр. 267. Приступљено 22. 3. 2021. „2009 Net Income (Loss) Attributable to AT&T - $12,138 (dollars in millions”
AT&T Inc. (24. 2. 2012). Form 10-K ANNUAL REPORT - 2011 (Извештај). стр. 267. Приступљено 22. 3. 2021. „2010 Net Income (Loss) Attributable to AT&T - $19,864 (dollars in millions”
„THE CHALLENGE OF DIVESTITURE”. The New York Times. 25. 10. 1983. Приступљено 23. 3. 2021. „Under the antitrust settlement A.T.& T. signed with the Justice Department in January 1982, the divested organizations not only will be local telephone carriers, but, with certain restrictions, they will have the right to enter other businesses as well.”
„THE CHALLENGE OF DIVESTITURE”. The New York Times. 25. 10. 1983. Приступљено 23. 3. 2021. „The 7 Holding Companies. The seven regional holding companies that will result from the breakup of the American Telephone and Telegraph Company are sketched here, with a brief outline of their potential strengths and weaknesses.”
„THE CHALLENGE OF DIVESTITURE”. The New York Times. 25. 10. 1983. Приступљено 23. 3. 2021. „Southwestern Bell, stretching from Arkansas through Texas into Missouri, will have only one existing local operating company, Southwestern Bell Telephone Company, under it, saving it any pains of integration.”
„DIGEST”. The Washington Post. 2. 3. 1994. Приступљено 23. 3. 2021. „AT&T is asking shareholders to change its official name from American Telephone & Telegraph Co. to AT&T Corp. at the annual meeting April 20 in Atlanta.”