Johnson, Allan G., author
McGraw-Hil, 1997
Buku Teks
Maurer, Herman H., author
Prentice-Hall, 1977
Buku Teks
Bird, Richard, author
Prentice-Hall, 1988
Buku Teks
Erickson, Bonnie H., author
McGraw-Hill, 1977
Buku Teks
Duncan, Otis Dudley, author
The Free Press of Glencoe, 1961
Buku Teks