APA (7th ed.) Citation

Crowther, J. G. (1966). Discoveries and inventions of the 20th century ([5th ed.). Routledge & K. Paul.

Chicago Style (17th ed.) Citation

Crowther, J. G. Discoveries and Inventions of the 20th Century. [5th ed. London: Routledge & K. Paul, 1966.

MLA (9th ed.) Citation

Crowther, J. G. Discoveries and Inventions of the 20th Century. [5th ed. Routledge & K. Paul, 1966.