No Inv.: 1144/P/Perp/95/1c
No Inv.: 2628-2629/S/Perp/85/2c~3836-3838/S/Perp/86/3c
No Inv.: 4058-4067/S/Perp/91/10c
No Inv.: 285/BC/Perp/88/1c
No Inv.: 075/AF/Perp/93/1c
Judul asli : "Communication of Innovations"
No Inv.: 2634-2635/Pb/Perp/85/2c~1818/P/Perp/91/1c~3739/Perp/99/1c
No Inv.: 1405-1407/S/Perp/91/3c
Bibliografi : hlm. 201-206
Bibliografi : hlm. 219 - 224