Coba jelasin Rujukan dari BT Group dalam bahasa melayu dong

Baldwin, F.G.C.  The History of the Telephone in the United Kingdom (1925)

Foreman-Peck, J. "The development and diffusion of telephone technology in Britain, 1900–1940," Transactions of the Newcomen Society, (1991–92).  63, pp165–180.

Foreman-Peck, J., & Millward, R. Public and private ownership of British industry 1820–1990 (1994).

Hazlewood, A. "The origins of the state telephone service in Britain" Oxford Economic Papers (1953).  5:13–25. in JSTOR

Johannessen, Neil. Ring up Britain: the Early Years of the Telephone in the United Kingdom (British Telecommunications plc, London, 1991)

Johnston, S. F. "The telephone in Scotland." in: K. Veitch, ed., Transport and Communications. Publications of the European Ethnological Research Centre; Scottish life and society: a compendium of Scottish ethnology (2009): pp. 716–727 online

Magill, Frank N. Great Events from History II: Business and Commerce Series, volume 1:1897–1923 (1994) pp 218–23; historiography

Meyer, Hugo Richard. Public Ownership and the Telephone in Great Britain: Restriction of the Industry by the State and the Municipalities (1907). online

Pitt, D.C. The telecommunications function in the British Post Office. A case study of bureaucratic adaption (Westmead: Saxon House, 1980).

Robertson, John Henry. The story of the telephone: A history of the telecommunications industry of Britain (1947)