Rubinstein, Ronald, author
Pelican Books, 1947
Buku Teks
Central of Information, 1973
Buku Teks
Oakland, John, author
Routledge , 1992
Buku Teks
Oakland, John, author
London; New York Routledge 1992,
Buku Teks
Jordan, Peter, author
Gower, 1998
Buku Teks