by Ellen Christina, M. Fuad, dkk $9.00
by Bambang Soepeno, M.Pd $9.00
by Prof. Dr. Suharsimi Arikunto $13.00
by Saul M. Katz $6.00
by Prof. Dr. H.A.R. Tilaar, MSc.Ed $11.00
by Drs. Amin Widjaja Tunggal, Ak., M.B.A $6.00