Shoemaker, I. H., Clarke, C., & Wierzbowski, W. S. (1999). Mad for modernism: Earl Horter and his collection. Philadelphia Museum of Art.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रShoemaker, Innis H., Christa Clarke, और William S. Wierzbowski. Mad for Modernism: Earl Horter and His Collection. Philadelphia, Pa.: Philadelphia Museum of Art, 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रShoemaker, Innis H., et al. Mad for Modernism: Earl Horter and His Collection. Philadelphia Museum of Art, 1999.
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