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
The World's Great Religions / the editors of Life
Time Incorporated, 1957
Buku Teks
Sheean, Vincent
Mahatma Gandhi: a great life in brief
New York: Alfred A Knopf, 1955
Buku Teks