Heim, B. B. (1981). Heraldry in the catholic church: Its origin, customs, and laws (2. ed.). Van Duren.
Citazione stile Chigago Style (17a edizione)Heim, Bruno Bernhard. Heraldry in the Catholic Church: Its Origin, Customs, and Laws. 2. ed. Gerrards Cross: Van Duren, 1981.
Citatione MLA (8a ed.)Heim, Bruno Bernhard. Heraldry in the Catholic Church: Its Origin, Customs, and Laws. 2. ed. Van Duren, 1981.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.