Al-Timmi, K., and Saeed سوسن S. “THE USE OF THE VARIABLE COSTS METHOD (THEORY) IN THE TAXATION ACCOUNTANCY ON PRIVATE AND IMBROGLIO COMPANIES”. TANMIYAT AL-RAFIDAIN, vol. 28, no. 84, Dec. 2006, pp. 85-99, doi:10.33899/tanra.2006.161629.