by Prof. Dr. Suharsimi Arikunto $6.00
by Vincent Gaspersz $11.00
by Drs. Yayan Sutrian $9.00
by David Berry $9.00
by Kunarjo $11.00
by Drs. H. Burhanuddin Salam, M.M $7.00
by Ir. St. Eka Adiwibawa $9.00
by Suharto, S.H. $11.00
by Dr. Khalid Abu Syadi $5.00
by Sisca Soewitomo $7.00
by David Bennahum $11.00
by Rajesh Kumar $6.00