Koten, M. E., Y. Kurniasih, and A. Langowuyo. “ANALISIS PERBEDAAN PENDAPATAN TOKO WALET MAS SEBELUM DAN SESUDAH PANDEMI COVID-19 DENGAN METODE MANN-WHITNEY”. Pattimura Proceeding: Conference of Science and Technology, Vol. 2, no. 1, Apr. 2022, pp. 503-8, https://ojs3.unpatti.ac.id/index.php/pcst/article/view/5653.