Garnet, R. W. (1985). The Telephone Enterprise: The Evolution of the Bell System's Horizontal Structure, 1876-1909. Baltimore: The Johns Hopkins University Press.
शिकागो स्टाइल उद्धरणGarnet, Robert W. The Telephone Enterprise: The Evolution of the Bell System's Horizontal Structure, 1876-1909. Baltimore: The Johns Hopkins University Press, 1985.
एमएलए उद्धरणGarnet, Robert W. The Telephone Enterprise: The Evolution of the Bell System's Horizontal Structure, 1876-1909. Baltimore: The Johns Hopkins University Press, 1985.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.