ADIYATNA, H. R. Blue Ocean Strategy Formulation In Non Formal Education Industry Study At Bimbingan Belajar Youth Educational Centre (Yec) . INTERNATIONAL JOURNAL OF ECONOMICS AND MANAGEMENT REVIEW, [S. l.], v. 1, n. 3, p. 66–76, 2023. DOI: 10.58765/ijemr.v1i3.167. Disponível em: https://jurnal.smartindo.org/index.php/ijemr/article/view/167. Acesso em: 17 apr. 2026.