Friedel, B. The Peal Family: On the Beginnings of a Democratic Art and Aesthetics in America / Bettina Friedel. Democracy and the arts in the United States.(1996).
Lua i Stíl Chicago (17ú heag.)Friedel, Bettina. "The Peal Family: On the Beginnings of a Democratic Art and Aesthetics in America / Bettina Friedel." Democracy and the Arts in the United States.(1996) .
Lua MLA (8ú heag.)Friedel, Bettina. "The Peal Family: On the Beginnings of a Democratic Art and Aesthetics in America / Bettina Friedel." Democracy and the Arts in the United States.(1996), .
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