Katz, William A., 1924-
Holt, Rinehart and Winston, 1979
Buku Teks
Libraries Unlimited, 2000
Buku Teks
Lancaster, F. Wilfrid
The Library Association, 1988
Buku Teks
Lancaster, F. Wilfrid
Uninersity of Illinois, 1993
Buku Teks
Singer, Paula M.
[American Management Association, ], 2009
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