Heim, B. B. (1981). Heraldry in the catholic church: Its origin, customs, and laws (2. ed.). Van Duren.
Chicago Style (17th ed.) CitationHeim, Bruno Bernhard. Heraldry in the Catholic Church: Its Origin, Customs, and Laws. 2. ed. Gerrards Cross: Van Duren, 1981.
MLA (8th ed.) CitationHeim, Bruno Bernhard. Heraldry in the Catholic Church: Its Origin, Customs, and Laws. 2. ed. Van Duren, 1981.
Warning: These citations may not always be 100% accurate.