by Wahyuni Mulyawati & Ilse Harahap $13.00
by Prof. dr. H. Sidarta Ilyas, SpM $11.00
by N. Riantiarno $16.00
by Prof. Dr. Veithzal Rivai $13.00
by Sitor Situmorang $7.00
by Hilman Hariwijaya $6.00
