No Inv.: 84923/P/Perp/03/1c
No Inv.: 68145-68147/S/00/3c
Judul asli : "Group Communication : Discussion Processes and Application"
No Inv.: 129630-129632/S/Perp/11/3c
No Inv.: 113354/P/Perp/08/1c
No Inv.: 2537-2546/P/Perp/97/10c
No Inv.: 48946/01/1c
No Inv.: 1162-1171/P/Perp/97/10c
No Inv.: 5302-5311/P/Perp/97/10c