by Drs. H. Fuad Ihsan $9.00
by Burhan Bungin $9.00
by Syahrin Harahap $9.00
by Dr. Ibrahim Bafadal, M.Pd $6.00
by Dr. Ibrahim Bafadal, M.Pd $9.00
by Prof. Drs. Piet A. Sahertian $7.00