by - $6.00
by Iman Budi Santosa $7.00
by Veithzal Rivai $16.00
by DR. Soekidjo Notoatmodjo $7.00
by $12.00
by Ir. Endar Sugiarto $9.00
by Loebis, Aboe Bakar $9.00
by Prof. Dr. Suharsimi Arikunto $13.00
by Nursalam $11.00