Ardis, Ann L., author
Cambridge University Press, 2002
eBooks
Hutchings, Stephen C., author
Cambridge University Press, 1997
Buku Teks
Martinus Nijhoff, 1976
Buku Teks
edited by Lawrence Cahoone
Blackwell Publishing, 2003
Buku Teks
Cooper, John Xiros, author
Cambridge University Press, 2009
eBooks