Glaeser, L., & Otto, F. (1978). The work of Frei Otto and his teams 1955 - 1976: Special issue devoted to the exhibition organized in 1971 ; published on the occasion of the exhibition's international tour / organized by the Institut für Auslandsbeziehungen, Stuttgart. Ludwig Glaeser. [Krämer] [u.a.].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGlaeser, Ludwig, और Frei Otto. The Work of Frei Otto and His Teams 1955 - 1976: Special Issue Devoted to the Exhibition Organized in 1971 ; Published on the Occasion of the Exhibition's International Tour / Organized by the Institut Für Auslandsbeziehungen, Stuttgart. Ludwig Glaeser. Stuttgart: [Krämer] [u.a.], 1978.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGlaeser, Ludwig, और Frei Otto. The Work of Frei Otto and His Teams 1955 - 1976: Special Issue Devoted to the Exhibition Organized in 1971 ; Published on the Occasion of the Exhibition's International Tour / Organized by the Institut Für Auslandsbeziehungen, Stuttgart. Ludwig Glaeser. [Krämer] [u.a.], 1978.