Anwar, Khoirul, & Maulidiyah Amalina Rizqi.
" VALIDITY AND RELIABILITY ANALYSIS OF ASSESSMENT FOR CUSTOMER SATISFACTION AT UNIVERSITY OF MUHAMMADIYAH GRESIK." <em>DIDAKTIKA : Jurnal Pemikiran Pendidikan</em> [Online], 22.2 (2016): 141-152. Web. 17 May. 2024