Judul asli : "Teaching Children Self-Discipline"
Judul asli : "Process of Educational Planning"
No Inv.: 3628/P/99/1c
Judul asli : "You Can Teach Your Child About Numbers"
No Inv.: 67050/P/00/1c
No Inv.: 4485/P/00/1c
No Inv.: 1724/S/96/1c
No Inv.: 67958-67967/S/00/10c
No Inv.: 79923/S/92/1c~1441/S/Perp/92/1c
No Inv.: 147/S/99/1c