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.
Lua i Stíl Chicago (17ú heag.)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.
Lua MLA (8ú heag.)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.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.