Não informado. (1973). Previews: Non-print software & hardware news & reviews. R.R. Bowker Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Previews: Non-print Software & Hardware News & Reviews. New York: R.R. Bowker Company, 1973.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Previews: Non-print Software & Hardware News & Reviews. R.R. Bowker Company, 1973.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.