Não informado. (1975). Quarterly progress and status report. Royal Institute of Technology, Department of Speech Communication and Music Accoustics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Quarterly Progress and Status Report. Stockholm: Royal Institute of Technology, Department of Speech Communication and Music Accoustics, 1975.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Quarterly Progress and Status Report. Royal Institute of Technology, Department of Speech Communication and Music Accoustics, 1975.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.