Jeffreys, H. (1998). Theory of probability (3rd ed.). Clarendon.
Lua i Stíl Chicago (17ú heag.)Jeffreys, Harold. Theory of Probability. 3rd ed. Oxford: Clarendon, 1998.
Lua MLA (9ú heag.)Jeffreys, Harold. Theory of Probability. 3rd ed. Clarendon, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.