APA (7th ed.) Citation

Babbage, C. (1971). On the economy of machinery and manufactures (4th ed. enl. (1835).). A. M. Kelley.

Chicago Style (17th ed.) Citation

Babbage, Charles. On the Economy of Machinery and Manufactures. 4th ed. enl. (1835). New York: A. M. Kelley, 1971.

MLA (9th ed.) Citation

Babbage, Charles. On the Economy of Machinery and Manufactures. 4th ed. enl. (1835). A. M. Kelley, 1971.