Pope Nicholas IV

Piccolomini, Aeneas Silvius. Gabel, Leona , 编. Memoirs of a Renaissance Pope. 由Gragg, Florence翻译. New York: Capricorn Books. 1959.  Pieper, Jan. Pienza:

sculpture, 1140–1300. pp. 95–98. Beckwith, John. (1961). "Review: The Tomb of Pope Clement II at Bamberg". The Burlington Magazine, Vol. 103, No. 700, pp. 321–322

Mathematical Sciences and New Philosophies, Tyacke, Nicholas (编), The History of the University of Oxford, IV Seventeenth-century Oxford: 380, 1997  维基共享资源中相关的多媒体资源：约翰·威尔金斯

天主教百科全书. New York: Robert Appleton Company. 1913.   Paschal Robinson. Pope Martin IV. 天主教百科全书. New York: Robert Appleton Company. 1913.   Paschal Robinson

N. Pope Nicholas II. The Catholic Encyclopedia. New York: Robert Appleton Company. 1911 [2017-12-25]. （原始内容存档于2017-12-25） –通过New Advent （英语）.  Pope Issues