Hartl, Robert
Wm. C. Brown Pub., 1986
Buku Teks
Awad, Elias M., author
Prentice-Hall, 2004
Buku Teks
Bittel, Lester Robert, author
McGraw-Hill, 1985
Buku Teks
Cobb, Anthony T., author
Sage, 2006
Buku Teks
Desouza, Kevin C, author
Hampshire, 2005
Buku Teks