Lynch, John (1984). Spain Under the Habsburgs (2nd ed.). New York: New York University Press. pp. 62–63. ISBN 0-8147-5010-9.
Pattenden, Miles (2013). Pius IV and the Fall of The Carafa: Nepotism and Papal Authority in Counter-Reformation Rome. OUP Oxford. pp. 21–22. ISBN 978-0191649615.
Woodward, Geoffrey (2013). "8". Philip II. London, New York: Routledge. ISBN 978-1317897736.