Bernhardt, Robert, author
West Publishing, 1991
Buku Teks
Xin-Tao Wu, editor
Springer, 2012
eBooks
Levy, Ernst, author
American Philosophical Society, 1951
Buku Teks
Welhendri Azwar, author
Research and Development Agency Ministry of Home Affairs, 2018
Artikel Jurnal
edited by Adam Mossoff, professor of law, editor; George Mason, University School of Law, Virginia, USA, editor
Edward Elgar, 2013
Buku Teks