No Inv.: 111/S/Perp/91/1c~78828-78837/S/01/10c~106828-106829, 106840-106841/P/Perp/06/4c
No Inv.: 119454-119456/P/Perp/09/3c~122341-122345/P/Perp/10/5c
No Inv.: 1613-1614/P/Perp/92/2c
Bibliografi : hlm. 273282
No Inv.: 132870/SM/Perp/12/1c
Judul Asli : Basic Montessori, Learning Activities for Under-Fives. Bibliografi : hlm. 376-377