Ravenal, J. B., & Jacobson, T. (1998). Twenty Philadelphia artists: Celebrating Fleisher Challenge at twenty. Philadelphia Museum of Art.

Ravenal, John B., and Thora Jacobson. Twenty Philadelphia Artists: Celebrating Fleisher Challenge at Twenty. Philadelphia, Pa.: Philadelphia Museum of Art, 1998.

Ravenal, John B., and Thora Jacobson. Twenty Philadelphia Artists: Celebrating Fleisher Challenge at Twenty. Philadelphia Museum of Art, 1998.