by L. Prasetya, Pr. $4.00
by Maria Monika Ratri dan Tim Penerbit OBOR $6.00
by Ir. Budi Samadi & Ir. Bambang Cahyono $7.00
by Muh. Majdi Marjan $7.00
by Agus S. Gunadi $7.00
by Ibrahim bin Fathi bin Abdul Al-Muqtadir $11.00