by Prof. Dr. Sudarwan Danim $11.00
by Drs. B. Suryosubroto $7.00
by Dr. Paul Suparno, SJ. Dkk $6.00
by Prof. Dr. Suharsimi Arikunto $11.00
by Leech, Geoffrey $7.00
by Drs. Syaiful Bahri Djamarah $9.00