Judul asli : "Successful Team Building"
No Inv.: 4518-4528/P/Perp/92/10c~126-128/P/Perp/92/3c~74706-74710/P/01/13c~115112/S/Perp/08/1c
Judul asli : "Youth and Moral"
No Inv.: 109793/PSM/Perp/07/1c
No Inv.: 131663/S/Perp/12/1c
No Inv.: 131678/S/Perp/12/1c
No Inv.: 131621/S/Perp/12/1c
Bibliografi : hlm. 224-225
Bibliografi : hlm. 309-311
Bibliografi : hlm. 138