RAHAYU, B.; GUSTIAWAN, W. D. . Standar Operasional Prosedur (SOP) Sebagai Upaya Menjaga Kualitas Pelayanan Di Defaros Barbershop Kota Kediri. Management Studies and Entrepreneurship Journal (MSEJ), [S. l.], v. 3, n. 6, p. 3889–3896, 2022. DOI: 10.37385/msej.v3i6.1100. Disponível em: https://journal.yrpipku.com/index.php/msej/article/view/1100. Acesso em: 6 jul. 2025.