by Michael P. Todaro $18.00
by Rimsky K. Judisseno $9.00
by Drs. H. Abu Ahmadi $11.00
by $7.00
by Adiwarman A. Karim $13.00
by H. Sony Sugema, MBA $7.00
by Prof. Dr. Husaini Usman, M.Pd & R. Purnomo Setiady Akbar, S.Pd., M.Pd $11.00
by Harris Effendi Thahar $7.00