APA (7th ed.) Citation

Jeffreys, H. (1961). Theory of probability (Third edition.). Clarendon Press.

Chicago Style (17th ed.) Citation

Jeffreys, Harold. Theory of Probability. Third edition. Oxford: Clarendon Press, 1961.

MLA (9th ed.) Citation

Jeffreys, Harold. Theory of Probability. Third edition. Clarendon Press, 1961.

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