Larsen, Paul B., author
Martinus Nijhoff pub., 2012
Buku Teks
Barlow, Patricia, author
Kluwer Law & Taxation, 1988
Buku Teks
American Immigration Lawyers Association, 1966
Buku Teks
George, Richard T. de
Regents Press of Kansas, 1980
Buku Referensi
edited by J.W. Payne
John Wiley & Sons, 1980
Buku Teks