Hulu, N., K. S. Lubis, K. Khairunnisa, K. Manurung, W. Ovianti, D. S. Syahreza, and A. Aprinawati. “The Role of Sales Promotion Girls As Frontliners in Wardah’s Product Marketing Strategy”. Economic: Journal Economic and Business, vol. 4, no. 1, Jan. 2025, pp. 27-31, doi:10.56495/ejeb.v4i1.855.