No Inv.: 616-618/P/Perp/92/3c~113471/P/Perp/08/1c~119808-119809/P/perp/09/2c
No Inv.: 51-52/P/Perp/92/2c
No Inv.: 290-292/P/Perp/92/3c~8499-8503/P/Perp/92/5c
No Inv.: 949-953/P/Perp/95/5c
Judul asli : "Learning to Lead"
No Inv.: 641/P/Perp/94/1c
No Inv.: 399-401/P/Perp/92/3c
No Inv.: 2524-2525/BD/Perp/87/2c
No Inv.: 3805/P/99/1c
Judul asli : "Power and Influence : Beyond Formal Authority"