Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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