Westheider, O., Philipp, M., Elger, D., Hortolani, V., Bretz, J., Butin, H., . . . Zweite, A. (2018). Gerhard Richter: Abstraction / edited by Ortrud Westheider and Michael Philipp ; exhibition Dietmar Elger, Ortrud Westheider with Valerie Hortolani ; with contributions by Janice Bretz, Hubertus Butin, Dietmar Elger, Valerie Hortolani, Matthias Krüger, Kerstin Küster, Ortrud Westheider, Armin Zweite. Prestel.
Chicago-referens (17:e uppl.)Westheider, Ortrud, Michael Philipp, Dietmar Elger, Valerie Hortolani, Janice Bretz, Hubertus Butin, Matthias Krüger, och Armin Zweite. Gerhard Richter: Abstraction / Edited by Ortrud Westheider and Michael Philipp ; Exhibition Dietmar Elger, Ortrud Westheider with Valerie Hortolani ; with Contributions by Janice Bretz, Hubertus Butin, Dietmar Elger, Valerie Hortolani, Matthias Krüger, Kerstin Küster, Ortrud Westheider, Armin Zweite. Munich ; London ; New York: Prestel, 2018.
MLA-referens (8:e uppl.)Westheider, Ortrud, et al. Gerhard Richter: Abstraction / Edited by Ortrud Westheider and Michael Philipp ; Exhibition Dietmar Elger, Ortrud Westheider with Valerie Hortolani ; with Contributions by Janice Bretz, Hubertus Butin, Dietmar Elger, Valerie Hortolani, Matthias Krüger, Kerstin Küster, Ortrud Westheider, Armin Zweite. Prestel, 2018.