APA (7th ed.) Citation

Collier, B. (1990). The little engines that could've: The calculating machines of Charles Babbage. Garland Pub..

Chicago Style (17th ed.) Citation

Collier, Bruce. The Little Engines That Could've: The Calculating Machines of Charles Babbage. New York: Garland Pub., 1990.

MLA (9th ed.) Citation

Collier, Bruce. The Little Engines That Could've: The Calculating Machines of Charles Babbage. Garland Pub., 1990.

Warning: These citations may not always be 100% accurate.