by Drs. Domi C. Matutina $12.00
by Drs. Zainal Abidin $9.00
by DR. Chairul Anwar, S.H $7.00
by Samsul Wahidin, S.H $7.00
by Prof. Dr. Suharsimi Arikunto $11.00
by Drs. H. Burhanuddin Salam, M.M $7.00