Norton, Alan
Cheltenham Edward Elgar , 1997
Buku Teks
McCormick, John, 1954-, author
Thomson Wadsworth, 2004
Buku Teks
Fried, Robert C., author
Prentice-Hall, 1980
Buku Teks
Hauss, Charles, author
Thomson Learning, 2003
Multimedia
Hauss, Charles, author
Wadsworth/Thomson Learning, 2003
Multimedia