YENNI, Rika Firma; HARTONO, Yusuf; PUTRI, Ratu Ilma Indra. Desain Aturan Sinus dan Aturan Cosinus Berbasis PMRI. Jurnal Pendidikan Matematika dan Sains, [S. l.], v. 2, n. 2, p. 97–108, 2014. DOI: 10.21831/jpms.v4i2.7160. Disponível em: https://journal.uny.ac.id/index.php/jpms/article/view/7160. Acesso em: 18 may. 2025.