by Tanenbaum $13.00
by Chung Su Hoo & Ng Gek Lan $5.00
by Dr. Soegeng Santoso, M.Pd dan Dra. Anne Lies Ranti., M.Pd $9.00
by WK $12.00
by Nursalam $12.00
by Ranakusuma, Boedisantoso $6.00