एपीए उद्धरण

Cardwell, D. S. L. (1972). Turning points in Western technology: A study of technology, science and history. New York: Science History Publications.

शिकागो स्टाइल उद्धरण

Cardwell, D. S. L. Turning Points in Western Technology: A Study of Technology, Science and History. New York: Science History Publications, 1972.

एमएलए उद्धरण

Cardwell, D. S. L. Turning Points in Western Technology: A Study of Technology, Science and History. New York: Science History Publications, 1972.