by Sentosa Sembiring, S.H., M.H. $5.00
by Irawan Soejito $6.00
by Prof. DR. Taliziduhu Ndraha $12.00
by Prof. Dr. H.A.R. Tilaar, MSc.Ed $9.00
by Dr. Dimyati dan Drs, Mudjiono $9.00
by M. Yahya Harahap, S.H. $16.00
by Drs. Akros Abidin, Mpd $7.00
by Sudradjat $7.00
by Ganijanti $16.00
by Katzung $24.00
by Katzung $30.00
by Dr. Aidh Al-Qami $9.00