by Pandji Anoraga, S.E, M.M $7.00
by Dr. H. Amzah B. Uno, M.Pd $7.00
by Sagimun MD $12.00
by Ir. H. Sudirman, Mpi & Prof. DR. Ir. Achmad Mellawa $9.00
by Syahrin Harahap $9.00
by Drs. Djalinus Syah $9.00