Albright, Madeleine, author
Harper Perenial, 2008
Buku Teks
Maier, Henry W
Random House, 1966
Buku Teks
Kouzes, James M., author
Jossey-bass, 2012
Buku Teks
White, B. Joseph, author
American Management Association, 2007
eBooks
Chong Wa Dae
The Secretariat for the President , 1987
Buku Teks