Komalasari D, Pebrianggara A, Oetarjo M. Buku Ajar Digital Marketing. umsidapress [Internet]. 2021 Sep. 24 [cited 2025 Jun. 26];:1-83. Available from: https://press.umsida.ac.id/index.php/umsidapress/article/view/978-623-6081-38-9