by Prof. Dr. Suharsimi Arikunto $11.00
by Mohammad Sobary $13.00
by Prof. J. Suprapto, M.A. APU $11.00
by Edilius, S.E., dkk $9.00
by Drs. Abas Kartadinata $13.00
by Dra. Ninik Widiyanti $12.00