Butt, Simon, author
Faculty of Law University of Indonesia, 2012
Artikel Jurnal
Collins, Harry, author
Cambridge University Press , 1993
Buku Teks
Artikel Jurnal
Kishore, Swapna, author
Tata McGraw-Hill, 1991
Buku Teks
Lambert, A. Vickie, author
Prentice Hall Englewood Cliffts , 1985
Buku Teks