by M.E. Dicks $6.00
by Dr. Farida Rahim, M.Ed $7.00
by Drs. Marcel Go, M.S $7.00
by Dr. B. Siswanto Sastrohadiwiryo $9.00
by Roger Konopasek $7.00
by Muda Markus $20.00
by Prof. Dr. Syahrin Harahap MA (Ed) $6.00