Judul asli :"Business Professional communications"
Bibliografi : hlm. 255-274No Inv.: 138209-138210/P/Perp/14/2c~143965/P/Perp/14/1c
No Inv.: 78320/01/1c~112497-112500/P/Perp/08/4c~117581-117582/P/Perp/09/2c
Judul asli : " Competitive intelligence"
Bibliografi : hlm. D1 - D3
Bibliografi : hlm 179
No Inv.: 129723,129724/S/Perp/11/2c
No Inv.: 115953-115955/P/Perp/09/3c
No Inv.: 86927-86936/P/Perp/03/10c~88664/P/Perp/04/1c
No Inv.: 114141/P/Perp/08/1c