Clark, Giles
Inside book publishing
Routledge, 1996
 Buku Referensi
Clark, Giles
Inside book publishing
Routledge , 1996
 Buku Teks SO
International book publishing : an encyclopedia
edited by Philip G. Altbach, Edith S. Hoshino
Fitzroy Dearborn, 1995
 Buku Referensi
Whitaker : publishers in the United Kingdom and their addresses, 1989
J. Whitaker & Sons, 1989
 Buku Referensi
Whitaker : publishers in the United Kingdom and their addresses, 1995
J. Whitaker & Sons, 1995
 Buku Referensi