Petrarch Quotes
"De vita solitaria". Book by Francesco Petrarca, 1346.
"Madalyn Aslan's Jupiter Signs: How to Improve Your Luck, Career, Health, Finances, Appearance, and Relationships Through the New Astrology". Book by Madalyn Aslan, 2003.
Letter to Dionigi di Borgo San Sepolcro, as translated by James Harvey Robinson (1898), April 26, 1336.
"Lifetime Speaker's Encyclopedia" by Jacob Morton Braude, p. 75, 1962.
Letter to Giovanni Boccaccio, April 28, 1373.