by Prof. Dr. Suharsimi Arikunto $18.00
by Ir. Moehar Daniel, M.S & Ir. Darmawati, M.Sc & Ir. Nieldalina, M.Si $7.00
by Masnur Muslich $9.00
by Abuddin Nata $12.00
by Prof. Dr. S. Nasution, M.A. $6.00
by Dr. Arief Budiman $5.00
by Prof. Mr. Dr. Sudargo Gautama $15.00
by Maurice Duverger/Alfian $12.00
by - $6.00
by Abdul Muta'al al-Jabry $6.00
by Martin Wijokongko $6.00