by Agusnawar, Amd. Par. $6.00
by Prof. I. R. Poedjawiyatna $7.00
by Prof. DR. Made Pidarta $9.00
by Untung Sukardji $12.00
by Moenaf H. Regar $9.00
by Prof. Dr. Suharsimi Arikunto $13.00
by $9.00