Ministry of Finance, 1996
Buku Teks SO
Richardson, Margaret Milner
John Wiley & Sons, 2000
Buku Teks SO
LM Patra, [Date of publication not identified]
Buku Teks
[Publisher not identified], 1968
Buku Teks SO
Helminen, Marjaana
Wolters Kluwer Law & Business, 2010
Buku Referensi