Hawkins, David F., author
Dow Jones/Irwin, 1972
Buku Teks
Fraser, Lyn M., author
Prentice-Hall International, 1995
Buku Teks
Brownlee, E. Richard, author
McGraw-Hill, 2001
Buku Teks
Brownlee, E. Richard, author
Irwin, 1998
Buku Teks
Ferris, Kenneth R., author
McGraw-Hill/Irwin, 1996
Buku Teks