Leman
The Best of Chinese life philosophies / Leman
Gramedia Pustaka Utama, 2007
 Buku Teks
Whiting, Percy H.
The five great rules of selling / Percy H. Whiting
Dale Carnegie & Associates, Inc., 1979
 Buku Teks
Jacobs, Jane
The death and life of great American cities
Random House , 1961
 Buku Teks
Jacobs, Jane
The Death and life of great American cities
Vintage Books, 1992
 Buku Teks
Sheean, Vincent
Mahatma Gandhi: a great life in brief
New York: Alfred A Knopf, 1955
 Buku Teks