APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Crowther, J. G. Discoveries and Inventions of the 20th Century. 5th ed. Lond.: Routledge, 1966.

MLA (8th ed.) Citation

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