Hughes, A. D., author
Blackstone, 1994
Buku Teks
Wilson, John Furness, author
Pitman, 1993
Buku Teks
Payne, William, author
Butterworth, 1985
Buku Teks
Girvin, Stephen, author
Oxford University Press, 2011
Buku Teks
Wilson, John Furness, author
Pearson education, 2010
Buku Teks