by - $12.00
by Drs. G. Kartasapoetra $12.00
by Dr. Zakiah Daradjat, dkk $11.00
by Drs. Rusyadi., dkk $28.00
by Dra. Rostamailis $9.00
by Drs. H. Burhanuddin Salam, M.M $9.00
by Drs. Syaiful Bahri Djamarah $7.00