Bibliografi : hlm. 155-158 No Inv.: 138779,138780/P/Perp/14/2c
No Inv.: 131784/SM/Perp/12/1c
No Inv.: 11681/Pb/Perp/93/1c~79937-79939/S/01/3c~79840/S/01/1c
No Inv.: 3551-3555/P/Perp/99/5c
No Inv.: 3576/P/99/1c
Judul asli :"Teaching Thinking"
No Inv.: 75356-75358/S/01/3c