Matthews, Basil
Edinburgh House Press, 1927
Buku Teks
edited by Edgar T. Thompson, Robert E. Park
Duke University Press, 1939
Buku Teks
Banton Michael, author
Tavistock Publications, 1969
Buku Teks
Mason, Philip, author
Oxford University Press, 1970
Buku Teks
Wade, Peter, author
Pluto Press, 2002
Buku Teks