S. W. Hutahaean, S. Napitupulu, and N. M. P. Hutabarat, “The Effect of Total Physical Response (TPR) on The Students’ Vocabulary Mastery of Grade X at SMA Swasta Kampus Nommensen Pematangsiantar”, Innovative, vol. 4, no. 1, pp. 12074–12085, Feb. 2024.