by Drs. B. Suryosubroto $9.00
by Prof. DR. Made Pidarta $11.00
by Ir. Setijo Pitojo $7.00
by Prof. Dr. Suharsimi Arikunto $11.00
by H. Rahmat Rukmana & Hj. Yuyun Yuniarsih, SP., MBA., MM $6.00
by Harry Simons $13.00
by Marga T $7.00