James, Francis Edmund Skone
Sweet & Maxwell, 1958
Buku Teks
Norman, Sandy, author
Facet Publishing, 2004
Buku Teks
Cornish, W.R. (William Rodolph), 1937-, author
Sweet and Maxwell, 2007
Buku Referensi
Curzon, L. B., author
Pitman, 1993
Buku Teks
Pedley, Paul, author
Aslib, 2000
Buku Teks