Fritsch, G., Martinez Celaya, E., & Kollwitz, K. (2021). Enrique Martínez Celaya - Käthe Kollwitz: Edited by Gudrun and Martin Fritsch, Juerg Judin, and Pay Matthis Karstens. Hatje Cantz.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFritsch, Gudrun, Enrique Martinez Celaya, और Käthe Kollwitz. Enrique Martínez Celaya - Käthe Kollwitz: Edited by Gudrun and Martin Fritsch, Juerg Judin, and Pay Matthis Karstens. Berlin: Hatje Cantz, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFritsch, Gudrun, et al. Enrique Martínez Celaya - Käthe Kollwitz: Edited by Gudrun and Martin Fritsch, Juerg Judin, and Pay Matthis Karstens. Hatje Cantz, 2021.
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