PUSPITASARI, S. Sampul Belakang 34 1 2016. Jurnal Penelitian Karet, [S. l.], v. 34, n. 1, p. xviii-xxiii, 2016. DOI: 10.22302/ppk.jpk.v34i1.312. Disponível em: https://ejournal.puslitkaret.co.id/index.php/jpk/article/view/312. Acesso em: 2 apr. 2025.