APA (7th ed.) Citation

Bernal, J. D. (1949). The freedom of necessity ((1. publ.).). Routledge & Paul.

Chicago Style (17th ed.) Citation

Bernal, John D. The Freedom of Necessity. (1. publ.). London: Routledge & Paul, 1949.

MLA (9th ed.) Citation

Bernal, John D. The Freedom of Necessity. (1. publ.). Routledge & Paul, 1949.