Não informado. (1988). Service report: Power plants, maintenance, upgrading. Siemens AG.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Service Report: Power Plants, Maintenance, Upgrading. Erlangen, Alemanha: Siemens AG, 1988.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Service Report: Power Plants, Maintenance, Upgrading. Siemens AG, 1988.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.