by Drs. Mustaqim $7.00
by Dra. Khusnul Khotimah $6.00
by Drs. Rusyadi., dkk $28.00
by Badan Pusat Statistik $35.00
by A. Tresna Sastrawijaya, M.Sc $7.00
by Denise Lardner $9.00