Kochar, R.S., author
Rajat Publications, 1998
Buku Teks
Hunter, Eric J., author
Library Association, 1991
Buku Teks
The Library of Conggress
The Library of Congress , 1949
Buku Teks
edited by I. C. McIlwaine
The Library Association, 1991
Buku Teks
Hartley, R.J., author
Bowker-Saur, 1990
Buku Teks