APA (7th ed.) Citation

Hempstead, C., & Worthington, W. E. (2005). Encyclopedia of 20th-century technology. Routledge.

Chicago Style (17th ed.) Citation

Hempstead, Colin, and William E. Worthington. Encyclopedia of 20th-century Technology. New York ; London: Routledge, 2005.

MLA (9th ed.) Citation

Hempstead, Colin, and William E. Worthington. Encyclopedia of 20th-century Technology. Routledge, 2005.