Rothwwell, Donald R., author
Cambridge University Press, 1996
Buku Teks
"Amsterdam: Elsevier, 1993",
Buku Teks
edited by Mark W. Janis
Martinus Nijhoff , 1991
Buku Teks
Harrison, James, author
Cambridge University Press, 2011
Buku Teks
Buzan, Barry, author
Cambridge University Press, 2003
Buku Teks