Burrows, William E.
Random House, 1998
Buku Teks
Sagan, Carl
Ballantine Books , 1997
Buku Teks
edited by Tanja L. Zwaan
[publisher not identified], 1988
Buku Teks
Gorove, Stephen
Martinus Nijhoff , 1991
Buku Teks
Diederiks-Verschoor, I. H. Philepina (Isabella Henrietta Philepina), 1915-
Kluwer Law International, 1993
Buku Teks