Kayleen M. Hazlehurst
Avebury, 2001
Buku Teks
Anderson, George, author
Oxford University Press, 2012
Buku Teks
Eccleston, Richard
Edward Elgar, 2007
Buku Teks
Charlesworth, James C. (James Clyde), 1900-, author
Harper, 1951
Buku Teks
Mikesell, R.M., author
Richard D. Irwin, 1961
Buku Teks