Penninger, J. M., Bast, G., Ziegelböck, M., Devuyst, E., Méhu-Blantar, I., & Heider, C. (2019). Looking glass: Photographic essays on the mechanisms of life / Josef Penninger, Gerald Bast, Maria Ziegelböck, Caroline Heider, Ines Méhu-Blantar, Evelyn Devuyst (editors). De Gruyter.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPenninger, Josef Martin, Gerald Bast, Maria Ziegelböck, Evelyn Devuyst, Ines Méhu-Blantar, और Caroline Heider. Looking Glass: Photographic Essays on the Mechanisms of Life / Josef Penninger, Gerald Bast, Maria Ziegelböck, Caroline Heider, Ines Méhu-Blantar, Evelyn Devuyst (editors). Berlin ; Boston: De Gruyter, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPenninger, Josef Martin, et al. Looking Glass: Photographic Essays on the Mechanisms of Life / Josef Penninger, Gerald Bast, Maria Ziegelböck, Caroline Heider, Ines Méhu-Blantar, Evelyn Devuyst (editors). De Gruyter, 2019.