Dewey, Patrick R.
American Library Association, 1990
Buku Referensi
Markless, Sharon
Facet Publishing, 2006
Buku Teks
Katz, William A., 1924-
Holt, Rinehart and Winston, 1979
Buku Teks
Doucett, Elisabeth
[American Management Association, ], 2008
eBooks
Singer, Paula M.
[American Management Association, ], 2009
eBooks