[publisher not identified], [date of publication not identified]
Buku Teks
Routledge, 1988
Buku Teks
Selby, David, author
Cambridge University Press, 1988
Buku Teks
edited by George Clack
[publisher not identified], 1998
Buku Teks
Nickel, James W., author
Blackwell , 2007
Buku Teks