Gorman, Michael
[American Library association;American Library association, American Library association], 2005
eBooks
Harrod, Leonard Montague
England : Gower Pub, 1987,
Buku Referensi
Powell, Ronald R.
Libraries Unlimited, Inc., 2004
Buku Teks SO
edited by G.E. Gorman
Facet, 2005
Buku Teks SO
Simpson, I.S.
Library Association, 1988
Buku Teks SO