Hidayati, N. “Pentingnya Peningkatan Kompetensi Bahasa Inggris Bagi Guru Anak Usia Dini”. Al Hikmah Indonesian Journal of Early Childhood Islamic Education, Vol. 2, no. 1, Aug. 2018, pp. 59-74, https://www.journal.uaindonesia.ac.id/index.php/ijecie/article/view/23.