Armstrong, W. (1988). Catholic doctrine playing cards: Key principles and basic facts of faith for school religion classes, C.C.D. programs and family instruction to children. The Author.
Čikaški stil citiranja (17. izdanje)Armstrong, William. Catholic Doctrine Playing Cards: Key Principles and Basic Facts of Faith for School Religion Classes, C.C.D. Programs and Family Instruction to Children. Tacoma, Wash.: The Author, 1988.
MLA način citiranja (8. izdanje)Armstrong, William. Catholic Doctrine Playing Cards: Key Principles and Basic Facts of Faith for School Religion Classes, C.C.D. Programs and Family Instruction to Children. The Author, 1988.
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