Stone, I. (1961). The agony and the ecstasy: A novel of Michelangelo / by Irving Stone (7. Auflage.). New American Library.
Chicago-referens (17:e uppl.)Stone, Irving. The Agony and the Ecstasy: A Novel of Michelangelo / by Irving Stone. 7. Auflage. New York: New American Library, 1961.
MLA-referens (8:e uppl.)Stone, Irving. The Agony and the Ecstasy: A Novel of Michelangelo / by Irving Stone. 7. Auflage. New American Library, 1961.
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