The Library of Conggress
The Library of Congress , 1949
Buku Teks
edited by I. C. McIlwaine
The Library Association, 1991
Buku Teks
Hunter, Eric J., author
Library Association, 1991
Buku Teks
Kochar, R.S., author
Rajat Publications, 1998
Buku Teks
Artikel Jurnal