by Prof. Dr. Veithzal Rivai, MBA $18.00
by Ir. Hatta Sunanta, B.Sc., MS $5.00
by Wahyuni Mulyawati & Ilse Harahap $7.00
by Neis. C. Johnson $7.00
by Yasa Boga $12.00
by Ir. Dudung Abdul Muslim $9.00