Carmichael, D.G., author
Ellis Horwood, 1981
Buku Teks
Shaeffer, R.E., author
Prentice-Hall, 2001
Buku Teks
edited by Edwin H. Gaylord, Jr., Charles N. Gaylord, James E. Stallmeyer.
McGraw-Hill, 1997
Buku Teks
Ratay, Robert T., author
McGraw-Hill, 2010
Buku Teks
Ratay, Robert T., editor-in-chief
McGraw-Hill, 2000
Buku Referensi