APA (7th ed.) Citation

Jeffreys, H. (1998). Theory of probability (3. ed., 1. publ. in the Oxford classics series.). Clarendon Press.

Chicago Style (17th ed.) Citation

Jeffreys, Harold. Theory of Probability. 3. ed., 1. publ. in the Oxford classics series. Oxford: Clarendon Press, 1998.

MLA (9th ed.) Citation

Jeffreys, Harold. Theory of Probability. 3. ed., 1. publ. in the Oxford classics series. Clarendon Press, 1998.