No Inv.: 127537-127541/P/Perp/10/5c~134741/SM/Perp/13/1c
No. Inv. : 149245-149246/P/Perp/15/2c
No Inv.: 130768/SM/Perp/11/1c~141895-141899/P/Perp/14/5c
Bibliografi : Hlm. 437-439
Judul asli : "Teaching Elementary School Mathematics for Understanding"
No Inv.: 942/P/Perp/95/1c~2560/P/Perp/95/1c
No Inv.: 134656/SM/Perp/13/1c~14115/PSM/Perp/14/1c
Bibliografi : hlm. 164-165