APA (7th ed.) Citation

Crowther, J. G. (1952). British scientists of the twentieth century. Routledge & K. Paul.

Chicago Style (17th ed.) Citation

Crowther, J. G. British Scientists of the Twentieth Century. London: Routledge & K. Paul, 1952.

MLA (8th ed.) Citation

Crowther, J. G. British Scientists of the Twentieth Century. Routledge & K. Paul, 1952.