APA (7th ed.) Citation

Jeffreys, H. (1961). Theory of probability / by Harold Jeffreys (3rd ed.). Clarendon.

Chicago Style (17th ed.) Citation

Jeffreys, Harold. Theory of Probability / by Harold Jeffreys. 3rd ed. Oxford: Clarendon, 1961.

MLA (9th ed.) Citation

Jeffreys, Harold. Theory of Probability / by Harold Jeffreys. 3rd ed. Clarendon, 1961.

Warning: These citations may not always be 100% accurate.