The Museum of Modern Art <New York, NY>, Ritchie, A. C., Haftmann, W., Hentzen, A., & Lieberman, W. S. (1957). German art of the twentieth century: By Werner Haftmann ; Alfred Hentzen ; William S. Lieberman. Edited by Andrew Carnduff Ritchie. The Museum of Modern Art, New York in collaboration with The City Art Museum of St. Louis, Missouri. Schuster and Schuster.

The Museum of Modern Art <New York, NY>, Andrew Carnduff Ritchie, Werner Haftmann, Alfred Hentzen, and William S. Lieberman. German Art of the Twentieth Century: By Werner Haftmann ; Alfred Hentzen ; William S. Lieberman. Edited by Andrew Carnduff Ritchie. The Museum of Modern Art, New York in Collaboration with The City Art Museum of St. Louis, Missouri. New York: Schuster and Schuster, 1957.

The Museum of Modern Art <New York, NY>, et al. German Art of the Twentieth Century: By Werner Haftmann ; Alfred Hentzen ; William S. Lieberman. Edited by Andrew Carnduff Ritchie. The Museum of Modern Art, New York in Collaboration with The City Art Museum of St. Louis, Missouri. Schuster and Schuster, 1957.