ADI, Wiruma Titian. Symbol and Theme on Robert Frost’ Poem by Using Biographical Perspective. LINGUA: Jurnal Bahasa, Sastra, dan Pengajarannya, [S. l.], v. 17, n. 1, p. 15–24, 2020. DOI: 10.30957/lingua.v17i1.621. Disponível em: https://lingua.soloclcs.org/index.php/lingua/article/view/621. Acesso em: 28 apr. 2025.