1. The Stimulation of General Reading;Mudge;Library Journal,1906
2. Cindy Faries, “Reference Librarians in the Information Age: Learning from the Past to Control the Future,” The Reference Librarian 20, no. 43 (1994):9-28. Available: http://www.informaworld.com/10.1300/J120v20n43_03. (March 2, 2010).
3. Reference Work: A Textbook for Students of Library Work and Librarians;Wyer,1930
4. Ibid.
5. The Library Journal, September 1, 1924, P. 748.