by Dr. Ali Abdul Halim Mahmud $11.00
by Mitra Agro Melodi $9.00
by Muhammad Ibnu Sirin $16.00
by Ir. Budi Samadi & Ir. Bambang Cahyono $7.00
by G. Budi Subanar, SJ. $6.00
by Prof. drh. Charles Rangga Tabbu, M.Sc., Ph.D $18.00