by Prof. Dr. Suharsimi Arikunto $13.00
by Ir. Kaslan A. Tohir $12.00
by Drs. Djalinus Syah., dkk $11.00
by Mana'ul Quthan, Terj. Halimuddin, S.H $9.00
by Louis Irving Horowitz $12.00
by Isjoni $8.00