by Prof. Dr. Suharsimi Arikunto $11.00
by Edilius, S.E dan Drs. Sudarsono, S.H., M.Si $11.00
by Baum, Warren C & Stokes M. Tolbert $9.00
by $11.00
by Prof. DR. Taliziduhu Ndraha $9.00
by Syam Hardy $7.00
by Harry Simons $12.00