by $13.00
by Alwi Alatas $7.00
by Clive Gray, Payaman Simanjuntak, dkk $12.00
by Prof. Drs. H. Lili M. Sadeli, M.Pd & Drs. H. Bedjo Siswanto, M.Si $9.00
by Veithzal Rivai $48.00
by Rober Slater $7.00