by $20.00
by Ir. H. Muhammad Syakir Sula, AAIJ, FIIS $31.00
by Redaksi (Penghimpun) $11.00
by Prof. Dr. H. Zainuddin Ali, M.A. $7.00
by Prof. Dr. Suharsimi Arikunto $11.00
by Freddy Rangkuti $9.00