TELAUMBANUA, Mentari Selfi Yanti; PASARIBU, Tiara Kristina; SIHITE, Jubil Ezer. The differences between American and British diphthong: A case study of Joe Biden and Boris Johnson. Jurnal Pendidikan dan Konseling (JPDK), [S. l.], v. 4, n. 5, p. 5711–5715, 2022. DOI: 10.31004/jpdk.v4i5.7579. Disponível em: https://journal.universitaspahlawan.ac.id/index.php/jpdk/article/view/7579. Acesso em: 16 dec. 2025.