Safrizal, and Siti Zulaikha. “PENGENDALIAN KUALITAS DENGAN METODE STATISTICAL QUALITY CONTROL PADA RAMADHANI BAKERY AND CAKE”. Jurnal Samudra Ekonomika, Vol. 5, no. 1, Apr. 2021, pp. 100-13, doi:10.33059/jse.v5i1.3449.