by Dr. Thomas Gordon $6.00
by Anthony F. Chiffolo $4.00
by Calvin S. Hall & Gradner Lindzey $11.00
by Traci Mullins & Ann Spangler $6.00
by Pijper, G.F $5.00
by Ahmad Abdul Hadi $5.00
by Moh. Said Al-Asymawi $9.00
by Ny. Susmayati, B.A $7.00
by Lipschutz $13.00
by Prof. DR. dr. S.M. Lumbantobing, SpS(K), SpKJ $5.00
by Suryatati A Manan, Martha Sinaga $7.00
by Isharry Agusjaya Moe $4.80