by Salomo Simanungkalit (Penyunting) $12.00
by Amitri Dinar Sari $9.00
by Sisca Soewitomo $6.00
by Ir. Arif Hartoyo, M. S $5.00
by M. Nashiruddin al-Albani $20.00
by Walker, Edward L $6.00