Dear Martina P. Tagacay This is most likely a reference in a AI generated paper, see for example https://teche.mq.edu.au/2023/02/why-does-chatgpt-generate-fake-references/ For two reasons:
-The title cannot be found in Google and/or Google Scholar
-There is no journal with the title Journal of Digital Media
Even if the citation were genuine, it purports to refer to a journal article. It is not a book citation, in which case there would ipso facto be no ebook to be found.