Cita APA (7a ed.)

Jeffreys, H. (1939). Theory of probability. Clarendon Press.

Cita Chicago Style (17a ed.)

Jeffreys, Harold. Theory of Probability. Oxford: Clarendon Press, 1939.

Cita MLA (9a ed.)

Jeffreys, Harold. Theory of Probability. Clarendon Press, 1939.