by Veithzal Rivai $48.00
by Peter Kasenda $7.21
by Endar Sugiarto & Ir. Kusmayadi $9.00
by Budi Irawanto $7.00
by Prof. Dr. Winardi $9.00
by Perserikatan Bangsa-Bangsa $7.00
by Srivastava, A.C. $6.00