Tyrrell, G. (1906). Lex credendi: A sequel to Lex orandi. Longmans, Green, and Co..
Lua i Stíl Chicago (17ú heag.)Tyrrell, George. Lex Credendi: A Sequel to Lex Orandi. New York ; London and Bombay: Longmans, Green, and Co., 1906.
Lua MLA (8ú heag.)Tyrrell, George. Lex Credendi: A Sequel to Lex Orandi. Longmans, Green, and Co., 1906.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.