Lecturer at the Faculty of Economics, Muria Kudus University, and the Accounting Professional Education (PPA) program, Diponegoro University. He earned his Bachelor of Economics degree in Accounting from the Faculty of Economics, Diponegoro University, Semarang, and his Master's degree in Accounting from Diponegoro University, Semarang. He also completed his doctoral studies in Economics at Diponegoro University. The autor also completed his undergraduate studies in Law at the University of Wahid Hasyim Semarang. In addition to being a lecturer, he is also a partner at the Purba lauddin and Partners Pulic Accounting Firm, Semarang Branch. The author is also a consultant at the Ashari Tax Consulting Firm. The books he has produced are Statistics, Theory and Application with MS Excel and SPSS ver. 11 (BP. Undip), Practical Guide to Understanding Financial Statements (Andi Yogyakarta), Statistical Applications with MS Excel and SPSS (Andi Yogyakarta), Accounting Programming for Trading Businesses with MS Access (Elex Media Komputindo Jakarta), Design of Payroll and Income Tax Application with MS Access (Elex Media Komputindo Jakarta), Design of Savings and Loan Accounting Application with MS Access (Elex Media Komputindo Jakarta), Computer-Assisted Auditing Techniques with MS.