Tolong jelaskan mengenai Catetan suku dari Francesco Petrarca dalam bahasa sunda

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Bishop, Morris (1961). "Petrarch." In J. H. Plumb (Ed.), Renaissance Profiles, pp. 1–17. New York: Harper & Row. ISBN 0-06-131162-6 .

Hanawalt, A. Barbara.  "The Middle Ages:An Illustrated History" pp. 131–132 Oxford University Press New York 1998

Kallendorf, Craig. "The Historical Petrarch," The American Historical Review, Vol 101, No. 1 (Feb. 1996): <130-141.>