Nurul Ain, Saskia, et al. “INNOVATION IN LEARNING MEDIA: FLASHCARDS FOR THE INDONESIAN NATIONAL ANTHEM: A RELIGIOUS, PHILOSOPHICAL, AND PSYCHOLOGICAL REVIEW IN ELEMENTARY SCHOOLS”. Jurnal Merah Putih Sekolah Dasar, vol. 3, no. 1, Sept. 2025, pp. 30-37, doi:10.24114/jmpsd.v3i1.69325.