Beattie, C.N.
The elements of income tax law
Stevens & Sons Lim, 1957
 Buku Teks
Innovation and the intellectual property system
edited by Andrew Webster and Kathryn Packer
Kluwer Law International, 1996
 Buku Teks
Colston, Catherine
Principles of intelectual property law
Cavendish Publishing, 1999
 Buku Teks
Potter, D.C. (Donald Charles)
Tax planning with precedents
Sweet & Maxwell, 1959
 Buku Teks
Henkow, Oskar
The VAT/​GST treatment of public bodies
The Netherlands Wolters Kluwer Law Business, 2013
 Buku Teks SO