No Inv.: 110915,110916/P/Perp/07/2c~129961/SM/Perp/11/1c
No Inv.: 3545-3546/P/Perp/91/2c
No Inv.: 107257/S/Perp/06/1c
Judul asli :"Business Professional communications"
No Inv.: 110897-110901/P/Perp/07/5c~119451-119453/P/Perp/09/3c~123201-123205/P/Perp/10/5c
No Inv.: 129723,129724/S/Perp/11/2c
No Inv.: 127177-127181/P/Perp/10/5c
Bibliografi : hlm 219-229