Hille, R.F., author
Prentice-Hall, 1988
Buku Teks
Riley, David D., author
Boyd & Fraser, 1987
Buku Teks
Headington, Mark R., author
Jones and Bartlett Publisher, 1997
Buku Teks
Carrano, Frank M., author
Pearson, 2005
Buku Teks
Willis, Claire, author
Pitman, 1992
Buku Teks