by Prof. Dr. Komarudin Hidayat $5.00
by L. Prasetya, Pr. $6.00
by PIKA $5.00
by Ir. Dedy Heryadi Sutisna, MS & Ratno Sutarmanto $6.00
by Titik F. Djafar - Siti Rahayu $6.00
by Ir. Moehar Daniel, M.S & Ir. Darmawati, M.Sc & Ir. Nieldalina, M.Si $7.00