by Tanenbaum $13.00
by Jonni M.S, M.Sitorus, Nelly K $7.00
by WK $12.00
by Prof. Dr. dr. H. Djang Jusi $9.00
by Turban, Rainer $26.00
by Bambang Sunggono, SH, MS & Aries Harianto, SH. $5.00