Manullang, Abel Josafat, et al. “No Tempest in a Teacup: Fentanyl Trafficking As a Threat to United States’ Security and Its Geopolitical Implications”. Security Intelligence Terrorism Journal (SITJ), vol. 2, no. 4, Dec. 2025, pp. 348-57, doi:10.70710/sitj.v2i4.71.