Yates, Rochelle
Library Professional Publications, 1986
Buku Teks
Pavon, Ana-Elba
[American Library association, American Library association], 2003
eBooks
Eble, Kenneth E.
Jossey-Bass, 1979
Buku Teks
Gannon, Michael
Prentice-Hall, 1982
Buku Referensi
Jerrard, Jane
American Management Association, 2009
eBooks