APA (7th ed.) Citation

Klein, M. C., & Klein, H. A. (1975). Käthe Kollwitz, life in art. Schocken Books.

Chicago Style (17th ed.) Citation

Klein, Mina C., and H. Arthur Klein. Käthe Kollwitz, Life in Art. New York: Schocken Books, 1975.

MLA (9th ed.) Citation

Klein, Mina C., and H. Arthur Klein. Käthe Kollwitz, Life in Art. Schocken Books, 1975.

Warning: These citations may not always be 100% accurate.