No Inv.: 1723/S/Perp/96/1c
No Inv.: 126902-126906/P/Perp/10/5c
No Inv.: 2074-2083/P/Perp/96/10c~107102/S/Perp/06/1c~120651/PH/Perp/09/1c~128616/PH/Perp/10/1c
No. Inv. : 149230/P/Perp/15/1c
Bibliografi : hlm. 195-199
Judul asli : "Communication of Innovations"
No Inv.: 1405-1407/S/Perp/91/3c
Bibliografi : hlm. 205-210