Cravens, David W., author
McGraw-Hill Irwin, 2002
Buku Teks
Delong, Thomas, author
McGraw-Hill Irwin, 2003
Buku Teks
Pearce, John A., author
Irwin, 1988
Buku Teks
Pearce, John A., author
Irwin, 1991
Buku Teks
David, Fred R., author
Prentice-Hall, 2001
Buku Teks