Eiki Berg , Piret Ehin
Asgate Pub., 2009
Buku Teks
edited by Jeffrey T. Checkel, Peter J. Katzenstein
Cambridge University Press, 2009
Buku Teks
Curtis, Michael, author
Harper & Row, 1965
Buku Teks
Wiener, Antje, author
Oxford University Press, 2009
Buku Teks
Coffey, Peter, author
Macmillan, 1971
Buku Teks