Não informado. (1977). Informatics Abstracts. All-Union Institute of Scientific and Technical Information.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Informatics Abstracts. Moscow: All-Union Institute of Scientific and Technical Information, 1977.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Informatics Abstracts. All-Union Institute of Scientific and Technical Information, 1977.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.