PUSPITASARI, S. Sampul Belakang 37 2 2019. Jurnal Penelitian Karet, [S. l.], v. 37, n. 2, p. xviii-xxii, 2021. DOI: 10.22302/ppk.jpk.v37i2.682. Disponível em: https://ejournal.puslitkaret.co.id/index.php/jpk/article/view/682. Acesso em: 22 jul. 2024.