MAHESH DUTTA MISHRA; AMAR SINGH RATHORE; ABHISHEK JAIN; SATISH MANWANI. Digital Marketing ROI Financial Evaluation of Online Campaigns. International Journal of Innovations in Science, Engineering And Management, [S. l.], v. 5, n. 1, p. 81–89, 2026. DOI: 10.69968/ijisem.2026v5i181-89. Disponível em: https://ijisem.com/journal/index.php/ijisem/article/view/452. Acesso em: 25 jan. 2026.