Bibliografi disetiap akhir bab No Inv.: 138555/P/Perp/14/1c~138916/P/Perp/14/1c
No Inv.: 416/P/Perp/98/1c
No Inv.: 413/P/Perp/98/1c
Judul asli : "Ethics in Business : a Guide for Manager"
Judul asli : "Inleiding tot de Wetenschapsleer"
Perpustakaan memiliki jilid 2
No Inv.: 4874-4897/P/Perp/99/5c
Judul asli : "How to Have Confidence and Power in Dealing with People"
No Inv.: 1190/BD/Perp/91/1c