No Inv.: 115655-115657/P/Perp/09/3c
Judul asli : "Communication of Innovations"
No Inv.: 10621-10622/P/Perp/92/2c
Bibliografi : hlm. 137-138
No Inv.: 2874-2883/P/Perp/97/10c
Judul asli : "Sybil"
No Inv.: 84487-84491/P/Perp/02/5c
Bibliografi : hlm. 135-136