Cabanellas, Guillermo
VCH, 1991
Buku Teks
edited by D. J. Gijlstra and D. F. Murphy
Kluwer, 1984
Buku Teks
Taylor, Paul M.
Sweet &Maxwell, 1999
Buku Teks
Mason, Peter
Routledge, 1998
Buku Teks
Willy Ilham Dasrul, examiner
Kluwer Harrap Handbooks, 1973
Buku Teks