(1996). El secreto de la felicidad familiar. Watch Tower Bible and Tract Society.
Čikaški stil citiranja (17. izdanje)El Secreto De La Felicidad Familiar. New York: Watch Tower Bible and Tract Society, 1996.
MLA način citiranja (9. izdanje)El Secreto De La Felicidad Familiar. Watch Tower Bible and Tract Society, 1996.
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