No Inv.: 139042-139046/P/Perp/14/5c
Bibliografi : hlm. 239 No Inv.: 141040/PSM/Perp/14/1c
No Inv.: 140651/SM/Perp/14/1c
Bibliografi : hlm. 307-330
Judul asli :"Business Professional communications"
Bibliografi : hlm 241-244
No Inv.: 111893-111895/P/Perp/08/3c~114834/PH/Perp/08/1c
Bibliografi : hlm. 167-171 No Inv.: 136860-136864/P/Perp/14/5c
Bibliografi : hlm. 207-211 No Inv.: 143617-143624/P/Perp/14/8c
No Inv.: 119718-119720/P/perp/09/3c