by Alex Wipperfurth $12.00
by Drs. Firman B. Aji dan Drs. Martin Sirait $9.00
by Drs. Sudarso $7.00
by Evan Pritchard $7.00
by Robert T. Kiyosaki $7.00
by Istimawan Dipohusodo $18.00
by George R. Terry $9.00
by Prof. Dr. Ir. Tri Yuwanta S.U., DEA $7.00
by WK $12.00
by Nursalam $13.00
by Daniel L. Smith $11.00
by - $16.00