Bibliografi : hlm. 163-167 No Inv.: 140893/Psm/Perp/14/1c
No Inv.: 119899-119901/P/Perp/09/3c
No Inv.: 139194-139195/P/Perp/14/2c
No Inv.: 101804-101807/P/Perp/05/4c
No Inv.: 112574-1112578/P/Perp/08/5c~117334-117336/P/Perp/09/3c
No Inv.: 101914-101916/P/Perp/05/3c~104635-104639/P/Perp/06/5c~106820-106823/PH/Perp/06/4c
Judul asli :"Seven times smarter"
No. Inv. : 150036/SM/Perp/15/1c
Bibliografi : hlm. 273-279 No Inv.: 140872-140876/P/Perp/14/5c~144583/PH/Perp/14/1c