edited by Thomas R. Dye, Brett W. Hawkins
Charles E. Merrill, 1967
Buku Teks
Tampion, John
GMC Publications, 1999
Buku Referensi
Thomson, Arthur A.
McGraw-Hill, 2006
Buku Teks
Kalfatovic, Martin R.
[American Library association, American Library association], 2002
eBooks
Taylor Cox, Jr.
Jossey-Bass, 2001
Buku Teks