Dorey, Peter, author
SAGE, 2014
Buku Teks
Rose, Richard, 1933-, author
Scott, Foreman, 1989
Buku Teks
Gooch, R.K. (Robert Kent), 1893-1982, author
D. Van Nostrad, 1937
Buku Teks
Stout, Hiram Miller, author
Oxford University Press, 1953
Buku Teks
Jones, Bill, author
Manchester University Press, 1991
Buku Teks