Fahlman, B. (1983). Pennsylvania modern: Charles Demuth and Lancaster. Philadelphia Museum of Art.
Čikaški stil citiranja (17. izdanje)Fahlman, Betsy. Pennsylvania Modern: Charles Demuth and Lancaster. Philadelphia, Pa.: Philadelphia Museum of Art, 1983.
MLA način citiranja (8. izdanje)Fahlman, Betsy. Pennsylvania Modern: Charles Demuth and Lancaster. Philadelphia Museum of Art, 1983.
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