No Inv.: 75453-75454/S/01/2c~110723-110727/P/Perp/07/5c
No Inv.: 131266/SM/Perp/12/1c
Bibliografi : hlm. 252-262
Judul asli : The 5 elements of effective thinking
No Inv.: 9936-9940/P/Perp/92/5c~855/S/Perp/90/1c~1035-1044/P/Perp/99/10c~78279/S/01/1c~79047-79049/01/3c
Judul asli :"Seven times smarter"
No Inv.: 131784/SM/Perp/12/1c
No Inv.: 3277-3296/P/Perp/97/20c
No Inv.: 109073,109074/S/Perp/07/2c~109377/PH/Perp/07/1c~115274/S/Perp/08/1c~129419/SM/Perp/11/1c
Bibliografi : hlm. 132-141