No Inv.: 133119/SM/Perp/12/1c~143203-143207/P/Perp/14/5c
Bibliografi : hlm. 143-144No Inv.: 140853/Psm/Perp/14/1c
Judul asli : "The Situational Leader"
No Inv.: 648/S/Perp/89/1c~1516/S/Perp/92/1c~10124-10128/P/Perp/97/5c
No Inv.: 133062/PSM/Perp/12/1c
No Inv.: 111094-111098/P/Perp/07/5c