Heim, B. B. (1978). Heraldry in the catholic church, its origin, customs and laws. van Duren.
Chicago-viite (17. p.)Heim, Bruno Bernard. Heraldry in the Catholic Church, Its Origin, Customs and Laws. Gerrards Gross: van Duren, 1978.
MLA-viite (8. p.)Heim, Bruno Bernard. Heraldry in the Catholic Church, Its Origin, Customs and Laws. van Duren, 1978.
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