Komalasari, Dewi, Alshaf Pebrianggara, and Mas Oetarjo. “Buku Ajar Digital Marketing”. Umsida Press (September 24, 2021): 1-83. Accessed December 16, 2024. https://press.umsida.ac.id/index.php/umsidapress/article/view/978-623-6081-38-9.