No Inv.: 14403/P/Perp/94/1c
No Inv.: 10482/P/Perp/92/1c
No Inv.: 51-52/P/Perp/92/2c
No Inv.: 949-953/P/Perp/95/5c
Judul asli : "Learning to Lead"
No Inv.: 641/P/Perp/94/1c
No Inv.: 2524-2525/BD/Perp/87/2c
No Inv.: 3805/P/99/1c
Judul asli : "Power and Influence : Beyond Formal Authority"
No Inv.: 74584-74585/P/01/2c