Crawford, John, author
Aslib, 2000
Buku Teks
Penna, C. V., author
Unesco , 1970
Buku Teks
Glover, Peggy D., author
Library Professional Publications , 1985
Buku Teks
McColvin, Lionel R., author
UNESCO , 1986
Buku Teks
edited by Gordon Stevenson and Sally Stevenson
The Haworth Press , 1984
Buku Teks