by Gerald Davidson $43.00
by Prof. Dr. Azhar Arsyad $7.00
by Prof. Dr. Ir. Ali Khomsan $9.00
by Prof. Dr. Soekartawi $7.00
by Prof. Mr. O.K. Brhan (diterjemahkan oleh: Linus Doludjawa) $9.00
by KH. Zainal Arifin Dj $6.00