Bibliografi : hlm. 137-138
No Inv.: 6550-6554/P/Perp/92/5c~2526-2530/P/Perp/95/5c
No Inv.: 322/S/Perp/90/1c~359/S/Perp/88/1c~80059/S/01/1
No Inv.: 351/P/Perp/92/1c~13412/P/Perp/94/1c
No Inv.: 1906/S/Perp/89/1c
Disertai panduan mengajar
Judul asli : "Learning from Experience"
Judul asli : "The Power of Positive Thinking for Young People"
No Inv.: 4102/P/Perp/95/1c