Hough, Jerry F.
The Brookings Institution, 1980
Buku Teks
Yukl, Gary A., 1940-
Prentice-Hall, 1994
Buku Teks
Nahavandi, Afsaneh, author
Prentice-Hall, 2000
Buku Teks
Liddle, R. William, author
Allen and Unwin, 1996
Buku Teks
Liddle, R. William, author
Allen & Unwin, 1996
Buku Teks