Purba, R. H. S., & Simamora, J. . (2025). The responsibility of electronic cigarette (e-cigarette) business operators who do not include information labels and warnings according to Law Firm Tomi Sihotang & Partners. TOFEDU: The Future of Education Journal, 4(2), 631–640. https://doi.org/10.61445/tofedu.v4i2.476