Judul asli : "Semantic theory"
No Inv.: 1027/P/Perp/99/1c
Judul asli : "The Language of Trade"
Judul asli :"Political communication"
No Inv.: 80930-80931/P/02/2c
No Inv.: 86314/PSM/Perp/03/1c
No Inv.: 86779-86783/P/Perp/03/5c~89705/PSM/Perp/04/1c
No Inv.: 112694/P/Perp/08/1c
No Inv.: 113881/P/Perp/08/1c
No Inv.: 117195/P/Perp/09/1c