Whitaker : publishers in the United Kingdom and their addresses, 1989
J. Whitaker & Sons, 1989
 Buku Referensi
5001 hard-to-find publishers and their addresses : 1987 edition
Alan Armstrong & Associates, 1987
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The writer's handbook, 1993
edited by Barry Turner
Macmillan and The Free Press, 1992
 Buku Referensi
Harrold, Ann
Libraries in the United Kingdom and the Republic of Ireland 1987
Library Association, 1986
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Shorter Aslib directory of information sources in the United Kingdom
edited by Ellen M. Codlin
Aslib, 1986
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