APA (7 वां संस्करण) प्रशस्ति पत्र

Leffingwell, E. (1989). Sao Paulo Diary: A posthumous Neil Williams exhibition in Sao Paulo prompts this tour through Brazil's modernist histor and its pluralist contemporary art scene. Art in America.

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

Leffingwell, Edward. "Sao Paulo Diary: A Posthumous Neil Williams Exhibition in Sao Paulo Prompts This Tour Through Brazil's Modernist Histor and Its Pluralist Contemporary Art Scene." Art in America 1989.

एमएलए (8वां संस्करण) प्रशस्ति पत्र

Leffingwell, Edward. "Sao Paulo Diary: A Posthumous Neil Williams Exhibition in Sao Paulo Prompts This Tour Through Brazil's Modernist Histor and Its Pluralist Contemporary Art Scene." Art in America, 1989.

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