Langley, R. (1991). Signs of the time... Apparitions, visions, locutions conderning the last times. Marian Center.
Čikaški stil citiranja (17. izdanje)Langley, Richard. Signs of the Time... Apparitions, Visions, Locutions Conderning the Last Times. Waterloo, IA: Marian Center, 1991.
MLA način citiranja (8. izdanje)Langley, Richard. Signs of the Time... Apparitions, Visions, Locutions Conderning the Last Times. Marian Center, 1991.
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