Istanto W, Amelia N, Anggoro SD. Validation and Reliability of Self-Efficacy English Learning of Health Vocational Students with Jigsaw Learning Strategy. anglophile [Internet]. 2022 Oct. 29 [cited 2026 May 2];3(1):14-25. Available from: https://attractivejournal.com/index.php/anglophile/article/view/481