Shim, Jae K.
Prentice-Hall, 1996
Buku Referensi
Roberta Carroll
Jossey-Bass, 2011
Buku Teks
edited by Jan Klabbers, Asa Wallendahl
Edward Elgar, 2011
Buku Teks
Bhagat, Rabi S.
Cambrigde University Press , 2009
Buku Teks
Worden, J. William, author
Routledge, 1991
Buku Teks