No Inv.: 2944-2953/P/Perp/97/10c~2797/P/98/1c
No Inv.: 111016-111020/P/Perp/07/5c
No Inv.: 2796-2800/P/Perp/95/5c
No Inv.: 3721/Perp/86/1c~3552/Perp/86/1c
Judul asli : "Effective Leadership, a Self-development Manual"
No Inv.: 3135-3136/P/Perp/91/2c~3475-3484/P/Perp/97/10c
No Inv.: 2060-2064/P/99/5c
No Inv.: 2972-2976/P/Perp/92/5c~11804-11808/P/Perp/94/5c~2431-2435/P/Perp/95/5c~1030/P/Perp/92/1c~103842/S/Perp/06/1c~103842/S/Perp/06/1c~114632/S/Perp/08/1c
No Inv.: 4346-4355/P/Perp/97/10c
Bibliografi : hlm. 263-265 No Inv.: 135995/SM/Perp/14/1c