No Inv.: 1268-1269/Perp/82/2c~105139/S/Perp/06/1c
Bibliografi : hlm. 263 - 264
No Inv.: 132672/SM/Perp/12/1c~139872-13987/P/Perp/14/5c
Bibliografi : hlm.
No Inv.: 131721/PH/Perp/12/1c~140393/SM/Perp/14/1c
Bibliografi : hlm. 191
Judul asli: "Corporate Protocol : a Brief Case for Business Etiquette"