Butts, B. (1991). Five centuries of drawing: Masterpieces from the Museum of Fine Arts, Leipzig; The Saint Louis Art Museum, February 2 - March 24, 1991 / Barbara Butts.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रButts, Barbara. Five Centuries of Drawing: Masterpieces from the Museum of Fine Arts, Leipzig; The Saint Louis Art Museum, February 2 - March 24, 1991 / Barbara Butts. Saint Louis, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रButts, Barbara. Five Centuries of Drawing: Masterpieces from the Museum of Fine Arts, Leipzig; The Saint Louis Art Museum, February 2 - March 24, 1991 / Barbara Butts. 1991.
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