Kugel, C. (1999). Green Academy: Government Training Centre, Herne-Sodingen, Germany : Architekten: Jourda & Perraudin. The Architectural Review.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKugel, Claudia. "Green Academy: Government Training Centre, Herne-Sodingen, Germany : Architekten: Jourda & Perraudin." The Architectural Review 1999.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKugel, Claudia. "Green Academy: Government Training Centre, Herne-Sodingen, Germany : Architekten: Jourda & Perraudin." The Architectural Review, 1999.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.