Tara, S. and Tarigan, C. U. (2026) “DEVELOPMENT OF AN E-BOOK ON INNOVATIONS IN HAIRCUT DESIGNS, SIN BUTTERFLY, SIN REBEL, AND SIN LAYBOB TO SUPPORT HAIRDRESSER COMPETENCY”, Journal of Beauty Science and Applied Cosmetology, 2(1), pp. 18–27. doi: 10.21831/jbsac.v2i1.2788.