Não informado. (1948). Books in Print: An index to the publishers trade list annual. R.R. Bowker Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Books in Print: An Index to the Publishers Trade List Annual. New York: R.R. Bowker Company, 1948.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Books in Print: An Index to the Publishers Trade List Annual. R.R. Bowker Company, 1948.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.