Gardner, J., & Giotto, 1. (2011). Giotto and his publics: Three paradigms of patronage. Harvard University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Gardner, Julian, و 1266?-1337 Giotto. Giotto and His Publics: Three Paradigms of Patronage. Cambridge, Mass.: Harvard University Press, 2011.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Gardner, Julian, و 1266?-1337 Giotto. Giotto and His Publics: Three Paradigms of Patronage. Harvard University Press, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.