Schwartz, David Joseph
Berfikir & berjiwa besar = The magic of thinking big
Pustaka Delapratasa, 1999
 Buku Teks
Schwartz, David Joseph
Berpikir dan berjiwa besar = the magic of thinking big
Binarupa Aksara, 1996
 Buku Teks SO
Schwartz, David Joseph
Berpikir dan berjiwa besar = the magic of thinking big
Binarupa Aksara, 1992
 Buku Teks
Robbins, Anthony
Awaken the giant within : how to take immediate control of your mental, emotional, physical & financial destiny!
A Freeside Book, 1991
 Buku Teks SO
Bell, O.O.
Goaling up
Everest Publishing Company, 1977
 Buku Teks SO