International Associational of university, 1993
Buku Referensi
editoed by Karl-Eduard von der Heydt, Stanley Keller
Graham & Trotman / Martinus Nijhoff, 1995
Buku Referensi
edited by Laszlo J. Kulcsar, Katherine J. Curtis
Springer, 2012
eBooks
edited by Albert Jan Van Den Berg
Kluwer Law and Taxation, 1984
Buku Teks
edited by Karl-Eduard von der Heydt and Stanley Keller
Graham & Trotman, 1995
Buku Teks