Bibliografi : hlm. 280-281
Bibliografi : hlm. 173-178 No Inv.: 134091/PSM/Perp/13/1c
No Inv.: 1735/S/Perp/92/1c~3216-3225/P/Perp/96/10c
Bibliografi :hlm 161-163
Judul asli : "Effective Supervision in a Factory"
Bibliografi : hlm. 251-259
Bibliografi : hlm. 207-214
Bibliografi : hlm. 240-245
Bibliografi : hlm. 283 - 289