Ardiana, Titin Eka, Nanang Cendriono, and Rizki Rachmadia. “The Effect of Auditor Independence on Internal Auditor Performance at Muhammadiyah Business Charities in Ponorogo Regency”. SUSTAINABLE 6, no. 1 (May 30, 2026): 142–156. Accessed October 2, 2026. https://journal.um-surabaya.ac.id/sustainable/article/view/30585.