by N. Edy Soetanto, BE. $5.00
by WK $9.00
by Suhana $12.00
by Iin Inayah $11.00
by Srivastava. UK., GV. Shenoy, SC. Sharma $11.00
by Lipschutz $12.00
by Thomas Keating $6.00
by Agus S. Gunadi $7.00
by Prof. Dr. Umar Fahmi Achmadi, M.P.H., Ph.D $11.00