by Gerry A. Carr $9.00
by Amru Khalid $7.00
by Andi Hamzah $11.00
by Tio Tek Hong $7.00
by Yernelis Sukma, M.S., & Yakup $7.00
by Veithzal Rivai $26.00
by Ir. Budi Samadi $0.00
by WK $12.00
by Dr. Sayyid M. Nuh $9.00