Bibliografi : hlm. 244 No Inv.: 126987-126991/P/Perp/10/5c~128830/PSM/Perp/10/1c~128913/SM/Perp/10/1c~130384/PSM/Perp/11/1c
No Inv.: 3748-3757/P/Perp/91/10c~4039-4047/S/Perp/91/9c
Judul asli : "The Powerful purpose of Introverts"
Bibliografi : hlm. 147-153
No Inv.: 134656/SM/Perp/13/1c~14115/PSM/Perp/14/1c
Bibliografi : hlm. 252-254 No Inv.: 132586/SM/Perp/12/1c~141090/PSM/Perp/14/1c
Bibliografi : hlm. 96
Termasuk bibliografi
Bibliografi : hlm. 127-129 No Inv.: 127442-127446/P/Perp/10/5c~127482-127486/P/Perp/10/5c~141109/PSM/Perp/14/1c