Shoemaker, I. H., Clarke, C., & Wierzbowski, W. S. (1999). Mad for modernism: Earl Horter and his collection. Philadelphia Museum of Art.

Shoemaker, Innis H., Christa Clarke, and William S. Wierzbowski. Mad for Modernism: Earl Horter and His Collection. Philadelphia, Pa.: Philadelphia Museum of Art, 1999.

Shoemaker, Innis H., et al. Mad for Modernism: Earl Horter and His Collection. Philadelphia Museum of Art, 1999.