Gilbert, C. (1968). Change in Piero della Francesca. New York: New York University, Institute of Fine Arts.
Παραπομπή Chicago StyleGilbert, Creighton. Change in Piero Della Francesca. New York: New York University, Institute of Fine Arts, 1968.
Παραπομπή MLAGilbert, Creighton. Change in Piero Della Francesca. New York: New York University, Institute of Fine Arts, 1968.
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