Judul asli : Developmentally appropriate practices, 5nd edition Bibliografi : hlm. 667-700
Bibliografi disetiap akhir bab No Inv.: 136403/SM/Perp/14/1c
Bibliografi : hlm. 183-188
Judul Asli : Basic Montessori, Learning Activities for Under-Fives. Bibliografi : hlm. 376-377
Bibliografi : hlm. 342-349
Bibliografi : hlm. 237-247
Bibliografi : hlm. 135