Montagu, Ashley, 1905-1999, author
The World Publishing, 1964
Buku Teks
Wade, Peter, author
Pluto Press, 2002
Buku Teks
Banton Michael, author
Tavistock Publications, 1969
Buku Teks
Mason, Philip, author
Oxford University Press, 1970
Buku Teks
Rex, John
Oxford University Press, 1979
Buku Teks