David Marquand; Ronald L. Nettler., editor
Blackwell Publisher, 2000
Buku Teks
Schulz, Ernest B
[publisher not identified], 1956
Buku Teks
Arblaster, Anthony, author
Open University Press, 1987
Buku Teks
Pritchard, Elizabeth, author
Stanford university press, 2014
Buku Teks
Korean Overseas Information Service, 1978
Buku Teks