by Ir. Rudy Gunawan $5.00
by WK $20.00
by J. Donald Walters $5.00
by Tanenbaum $13.00
by Ir. Ari Wijayani Purwanto $11.00
by Ir. Suharto $9.00
by Edi AH Iyubenu $6.00
by Prof. Dr. Baharuddin Lopa, S.H. dan Dr. Adi Hamzah, S.H. $9.00