by Ir. Budi Rafitas $7.00
by Prof. Dr. Sondang P. Siagian, M.P.A $9.00
by Irma Setyowati Soemitro, S.H $6.00
by J. I. G. M. Drost, SJ $11.00
by Drs. Slameto $7.00
by J. Robert Starratt $7.00