Bibliografi : hlm. 453-458
No Inv.: 117531,117645-117648/P/Perp/09/5c
Judul asli : "Telemarketing"
Bibliografi : hlm 219-229
No Inv.: 101235/P/Perp/05/1c~110887-110090/P/Perp/4c~115172/PH/Perp/08/1c~116538-116540/P/Perp/09/3c~118906-118908/P/Perp/09/3c~125376-125380/P/Perp/10/5c~125915-125919/P/Perp/10/5c
Bibliografi : hlm. 211-233
No Inv.: 129175/S/Perp/11/1c
No Inv.: 140948/Psm/Perp/14/1c
No Inv.: 112623-112626/P/Perp/08/4c~118990-118992/P/Perp/09/3c