by Edhi Sutardja $6.00
by - $13.00
by Drs. H. Malayu S.P. Hasibuan $11.00
by Prof. Dr. S. Nasution, M.A. $7.00
by Prof. Syekh Abdul Aziz Syawisy $6.00
by Mohamad Muslich, S.E., M.B.A $7.00