Klemm, Friedrich, author
George Allen and Unwind, 1959
Buku Teks
Negrotti, Massimo, author
Springer-Verlag, 2012
eBooks
Gazda, Istvan, author
Kluwer Law International, 1996
Buku Teks
A. Nuruddin, author
ITB Press, 2011
Buku Teks
Roth, A., author
North Holland, 1989
Buku Teks