Warner, Kenneth O.
Public Personnel Association , 1967
Buku Teks
Schoen, Sterling H
Richard D.Irwin, 1982
Buku Teks
Singh, Nagendra Kumar
Stevens and Sons, 1983
Buku Teks
Kaczorowska, Alina, author
Kluwer Law International, 1995
Buku Teks
Mohd. Afandi Salleh
International Law Book Services, 2002
Buku Teks