APA način citiranja (7. izdanje)
Helmreich, E. C. (1964). A free church in a free state?: The Catholic Church, Italy, Germany, France, 1864-1914. Heath.
Čikaški stil citiranja (17. izdanje)
Helmreich, Ernst Christian. A Free Church in a Free State?: The Catholic Church, Italy, Germany, France, 1864-1914. Boston: Heath, 1964.
MLA način citiranja (9. izdanje)
Helmreich, Ernst Christian. A Free Church in a Free State?: The Catholic Church, Italy, Germany, France, 1864-1914. Heath, 1964.
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