supardi, D., hamzah, A. (2007). e-solution financial standar program sertifikasi internasional (Ed. 1). yogyakata: graha llmu.

supardi, Deddy., hamzah, Amir. "e-solution financial standar program sertifikasi internasional". Ed. 1 yogyakata: graha llmu, 2007. Monograf.