^"...Admiral Khair-ed-Din Barbarossa led a costly siege which eventually recovered the port". Jaques, Tony: Dictionary of Battles and Sieges. Vol. I: A-E. Westport: Greenwood Press, 2007. (ردمك 9780313335372), p. 210.
^Pardo Molero states that Barbasossa endured an "extremely hard siege campaign" and later the admiral assured to the imperial agent Pedro Sánchez that "...what happened in Castelnuovo was the greatest feat among all he had seen or heard about". Pardo Molero, Juan Francisco: La defensa del Imperio: Carlos V, Valencia y el Mediterráneo. Madrid: Sociedad Estatal para la Conmemoración de los Centenarios de Felipe II y Carlos V, 2001. (ردمك 9788495146687), p. 328.
^"At no time can one say without exaggeration that a stronghold had been defended with more heroism". Preveden, Francis Ralph: A history of the Croatian people from their arrival on the shores of the Adriatic to the present day. New York: Philosophical Library, 1962. OCLC 949507306, p. 193. نسخة محفوظة 2020-02-02 على موقع واي باك مشين.
^"When the Turks entered Castelnuovo over the rubble and the Spanish corpses, Barbarossa had to admit that their losses amounted to more than nineteen thousand". Santiago, Vicente: Carlos I de España. Barcelona: Mateu, 1959. OCLC 19218641, p. 158. نسخة محفوظة 2020-02-02 على موقع واي باك مشين.
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