2 1 20 Ernan Rustiadi Editor Agustina M. Purnomo Editor Arif Satria Editor Arief Daryanto Contributor Wahyu Purwakusuma Contributor Tri Mumpuni Contributor Tridoyo Kusumastanto Contributor Tantan Hermansah Contributor Tajuddin Bantacut Contributor Setia Hadi Contributor Nunung Nuryartoro Contributor Naik Sinukaban Contributor Luky Andrianto Contributor Aida Vitayala Hubeis Contributor Ivanovich Agusta Contributor Hardinsyah Contributor Endriatmo Soetarto Contributor D.P Tejo Baskoro Contributor Didit Okta Pribadi Contributor Arya Hadi Dharmawan Contributor Lala M. Kolopaking Contributor mixed material 9786028955843 Ernan Rustiadi Additional Author Sunsun Saefulhakim Additional Author Dyah R. Panuju Additional Author mixed material 9794616871