एपीए उद्धरण

(1961). Charles Babbage on the principles and development of the calculator: And other seminal writings. New York: Dover Publications.

शिकागो स्टाइल उद्धरण

Charles Babbage On the Principles and Development of the Calculator: And Other Seminal Writings. New York: Dover Publications, 1961.

एमएलए उद्धरण

Charles Babbage On the Principles and Development of the Calculator: And Other Seminal Writings. New York: Dover Publications, 1961.