Shahibah, K., B. Hariadi, and Z. Baridwan. “The Effect of Quality Control System on Audit Quality: Professional Skepticism As the Moderator Variable”. International Journal of Research in Business and Social Science (2147- 4478), vol. 9, no. 4, July 2020, pp. 419-25, doi:10.20525/ijrbs.v9i4.782.