PENNINGTON, K.: Pope and bishops. The papal monarchy in the twelfth and thirteenth centuries (The Middle Ages; University of Pennsylvania Press, 1984), XVI + 224 pp.
García y García, Antonio. "PENNINGTON, K.: Pope and bishops. The papal monarchy in the twelfth and thirteenth centuries (The Middle Ages; University of Pennsylvania Press, 1984), XVI + 224 pp.". ANUARIO DE HISTORIA DEL DERECHO ESPAÑOL. 1987. pp. 1078-1079.
