Bibliografi : hlm. 337-360
No Inv.: 134854/SM/Perp/13/1c
No Inv.: 133767,133768/PSM/Perp/13/2c~135077/SM/Perp/13/1c~137603,137604/SM/Perp/14/2c
Judul asli : The 5 elements of effective thinking
No Inv.: 133062/PSM/Perp/12/1c
No Inv.: 131081/SM/Perp/12/1c~134756/SM/Perp/13/1c