Fito Hanif Ramadhan, and Fani Khoirotunnisa. “Analysis Of Digital Marketing Strategies In Increasing Sales Of B21 Digital Printing In Gresik City”. Jurnal Multidisiplin Sahombu, vol. 5, no. 03, Apr. 2025, pp. 395-01, https://ejournal.seaninstitute.or.id/index.php/JMS/article/view/6321.