Kolence, Kenneth W., author
McGraw-Hill, 1985
Buku Teks
Abrams, Marshall D., author
Addison-Wesley, 1973
Buku Teks
Booth, Taylor L., author
Wiley, 1984
Buku Teks
Hanneman, Henri W., author
Kluwer, 1985
Buku Teks
Skees, William D.
Lifetime learning , 1981
Buku Teks