by Helbert A. Simon $13.00
by Donald J. Bawersok $12.00
by Wiratha $0.00
by Dr. Sjarkawi, M.Pd $7.00
by Geoffrey Robinson $18.00
by Redaksi (Penghimpun) $9.00
by Prof. DR. dr. S.M. Lumbantobing, SpS(K), SpKJ $6.00