Mohd. Afandi Salleh
International Law Book Services, 2002
Buku Teks
Friedman, Robert D.
The Conservation Foundation, 1981
Buku Teks
Kluwer Law International, 1997
Buku Teks
Institute of Southeast Asian Studies, 995.
Buku Teks
Pearson, Charles S.
The Johns hopkins university, 1975
Buku Teks