Treacy, G. C. (1927). After Death, What?: Heaven, Purgatory, Hell. New York.
Lua i Stíl Chicago (17ú heag.)Treacy, Gerald C. After Death, What?: Heaven, Purgatory, Hell. New York, 1927.
Lua MLA (8ú heag.)Treacy, Gerald C. After Death, What?: Heaven, Purgatory, Hell. New York, 1927.
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