Daftar Isi:
  • The purpose of this study was to obtain empirical evidence regarding the implementation of internal audit on the sale was held seraca adequate, effectiveness and efficiency of internal control over sales, the influence of internal audit of the effectiveness and efficiency of internal control penjulan. The object of research is part of the sale of PT "X". The analysis tools are the Pearson product moment, Spearman-Brown, and Least Square Regression Method. The sample size used by 50 respondents. This can be seen from the hypothesis t > t ) / 2 � 314.8 > 2021 � Ho is rejected (H1 accepted). Results: The internal audit significantly influence the effectiveness and efficiency of internal control of sales.