by Drs. Slamet Saksono $7.00
by Drs. Abdullah Ali, Drs. Misbandono, dan Ir. Eny Rahma $7.00
by Dr. Ibrahim Bafadal, M.Pd $9.00
by Supranto, J. $7.00
by Akhmad Fauzi, Ph.D. $12.00
by Bhikhu Parekh $20.00