Brunsson, Nils, author
John Wiley & Sons, 1985
Buku Teks
Harvey, Donald F., author
Prentice Hall International, 1996
Buku Teks
Roeber, Richard J.C., author
Addison-Wesley, 1973
Buku Teks
Harvey, Donald F., author
Prentice-Hall, 1992
Buku Teks
Gilley, Jerry W, author
Perseus Books, 2000
Buku Teks