Fahlman, B. (1983). Pennsylvania modern: Charles Demuth and Lancaster. Philadelphia Museum of Art.
Cita Chicago (17th ed.)Fahlman, Betsy. Pennsylvania Modern: Charles Demuth and Lancaster. Philadelphia, Pa.: Philadelphia Museum of Art, 1983.
Cita MLA (8th ed.)Fahlman, Betsy. Pennsylvania Modern: Charles Demuth and Lancaster. Philadelphia Museum of Art, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.